Netalux Kamino 300

Sculpture and ornament sold as alabaster are usually a soft gypsum hydrate rather than marble. That distinction decides the job. A dry laser pass can take off soot and later coatings if energy stays gentle enough that the stone does not dehydrate, powder, or take a glaze. Water will dissolve the same face. Moisture and heat matter more than almost any other pair of issues. A hidden-face trial on the actual piece sets working energy before any full-area pass.

Paving and monuments in basalt are dark volcanic stone, and that darkness means the face absorbs heat quickly. Crust and later coatings can come off with a dry laser pass when the stone type is identified and silica-bearing dust is captured at the head. A copied limestone or sandstone setting can fracture a vein or glaze a polished face. A trial on the actual quarry product comes before any full-area pass.

Patio and facade panels sold as bluestone can be quartz-bearing sandstone or a denser igneous stone. A copied sandstone or limestone setting can fracture the wrong face. Soil and later coatings can come off with a dry laser pass when the quarry type is known and silica-bearing dust is captured on sandstone-class stock. A trial on the actual panel comes before patio or facade work.

A single pass removes gelcoat from the resin surface without touching the glass fiber laminate underneath, provided power stays low enough to stop at that boundary. Old paint and antifouling residue sit on that same gelcoat skin, and [mold release residue](/contaminants/composite-manufacturing-laser-cleaning) left over from layup responds to the same setting. Fiberglass runs a polyester or vinyl ester resin around glass fiber, so it needs different parameters than [FRPU](/materials/fiber-reinforced-polyurethane-frpu-laser-cleaning), built on a urethane matrix, or [Kevlar](/materials/kevlar-reinforced-polymer-laser-cleaning), woven from aramid fiber. A test coupon on scrap laminate confirms the setting clears gelcoat before it reaches fiber.

A laser removes soot, biological film, and thin coatings from quartzite without pushing residue into the stone, because the fused quartz grain structure leaves almost no open pore space to trap it. That same density leaves little room for error before the crystalline sheen scorches or an iron-bearing vein discolors. Cladding panels and heritage facades built from this recrystallized, heat-fused quartz sand each carry different soiling histories, so a test patch on the actual slab still decides the final choices. Quartzite is not [sandstone](/materials/sandstone-laser-cleaning), which stays sedimentary and porous so contaminants sit deeper and the safe energy range shifts. It is also not [soapstone](/materials/soapstone-laser-cleaning), a soft talc-silicate that scratches and dulls at energy levels quartzite tolerates well.

Serpentine panels and California greenstone can take a pulsed laser pass that removes soiling from the stone face, but mineral identity comes first. Some lots can hold asbestiform fiber, so dust capture and screening belong on the setup before any pass. The stone is softer and more variable than marble. A hidden-face trial on the actual panel maps color change and grain loss. Settings meant for [granite](/materials/granite-laser-cleaning) or carbonate stone stay off this path.

A pulsed beam clears soot and grease film from talc-rich hearths and counters without the grooves or fine white powder that sanding pads leave on soapstone. The stone is mostly talc, a magnesium silicate soft enough to mark with a fingernail, so the same abrasive pads that work on harder rock already cut visible grooves and dust the room. Beam output stays well below the point where talc's low thermal conductivity would let heat pool and glaze the surface into a shiny, discolored patch. This stone is not [sandstone](/materials/sandstone-laser-cleaning) or [quartzite](/materials/quartzite-laser-cleaning); both run several times harder on the Mohs scale and tolerate more heat before scorching, so a recipe copied from either one overshoots almost immediately on soapstone. What this cleaning will not do is restore a scratched or gouged counter to a factory polish, undo years of oil darkening that has soaked past the surface, or replace the wax reseal that soapstone hearths need after every cleaning pass.

Stainless steel begins to ablate surface films near 0.41 J/cm² at 1064 nm, and that onset is far below where the base metal itself takes damage. The damage threshold runs 5 to 12 J/cm², so the wide margin between those two numbers hides a lot of room for a setting that looks clean but is still wrong for the job. A fabricator cleaning 304L before welding can hit a fluence inside that margin that looks clean to the eye while still stripping chromium from the surface layer, leaving a passive film that forms slower and corrodes sooner than an undamaged one. This page covers the shared ablation and thermal behavior across the austenitic, ferritic, and duplex families, and routes grade-specific parameters to [304 stainless](/materials/stainless-steel-304-laser-cleaning) and [316 stainless](/materials/stainless-steel-316-laser-cleaning), since those two see the most pre-weld and marine-service cleaning. It does not set one fluence for the whole family; molybdenum content, surface finish, and the operation (passivation, weld prep, or scale removal) each shift where that safe range sits. Readers doing weld prep should also check the [weld passivation](/applications/stainless-steel-weld-passivation-laser-cleaning) page for the chromium-depletion risk in more depth.

Laser cleaning removes rust, mill scale, and weld discoloration from steel without media, holding fluence near a 1.5 J/cm² cleaning floor and stopping short of the 4.5 J/cm² mark that scars bare metal. Intact mill scale still needs mechanical pre-treatment under AMPP SP21511-1 first. Compare with [stainless steel](/materials/stainless-steel-laser-cleaning) or [cast iron](/materials/cast-iron-laser-cleaning) laser cleaning when the substrate is mixed, and see [weld prep](/applications/weld-prep-laser-cleaning-applications) for the fabrication step this feeds.

Taking soot and paint film off exterior cement stucco with a pulsed laser works when energy stays inside a safe range for cementitious walls. Sand in the mix makes respirable silica the first shop issue, so capture belongs on before anyone raises energy. Gypsum plaster recipes do not belong on this path.

Laser rust removal in the Bay Area is a technician on the job. The day rate is $800/day on [services](/services). Laser cleaning removes field [rust](/contaminants/iron-oxide-rust-laser-cleaning) from sound [steel](/materials/steel-laser-cleaning) on Bay Area yards, docks, and marine sites when the oxide sits on intact metal. It does not productively clear intact mill scale, which still needs mechanical abrasion. Deep pits are missing metal, not a film a beam can restore. Oxide hidden under lagging needs access before cleaning can reach it. Coating specifications that call for a blast profile still require blasting after oxide removal. When old coatings sit under the oxide, [paint removal](/applications/laser-paint-coating-removal-bay-area) is a different pass. In marine air, lockout, dust capture, and same-shift priming matter because bare steel reoxidizes fast near the bay.

High-pressure die-casting tooling fails for a different reason than an [injection mold](/applications/injection-mold-tooling-laser-cleaning): molten [aluminum](/materials/aluminum-laser-cleaning) reacts with iron in [H13 cavity steel](/materials/tool-steel-laser-cleaning) to form a hard Fe-Al intermetallic layer that raises cavity roughness and locks a shot in place long before surface dirt alone would cause a reject. OSHA Table Z-1 caps total nuisance dust at 15 milligrams per cubic meter in an enclosed die-casting cell, and laser cleaning strips that intermetallic film and the carbonized release residue around it without the abrasive media that would raise roughness further. The process also leaves PVD and nitride anti-soldering coatings intact, where abrasive blasting cuts through them in one pass. It does not recoat a worn insert or re-cut a soldered cavity back to print dimensions.

Weld preparation laser cleaning removes rust, mill scale, oil, and drawing compound from a joint face right before the arc or beam strikes, so the fitter is not grinding or wire-brushing the same edge on a tight schedule. The laser step targets a thin surface layer only and leaves the base metal dimensions alone, which fits both carbon [steel](/materials/steel-laser-cleaning) and [stainless steel](/materials/stainless-steel-laser-cleaning) joints across [metal fabrication](/applications/metal-fabrication-laser-cleaning-applications) shops. It clears [iron oxide rust](/contaminants/iron-oxide-rust-laser-cleaning) and light mill scale from an edge in a pass or two, but it will not strip heavy, multi-layer scale in one shot, and it is not a substitute for the post-weld passivation steps covered on the [stainless steel weld passivation](/applications/stainless-steel-weld-passivation-laser-cleaning) page. A cleaned joint face still needs a qualified welder to check fit-up, gap, and preheat against the governing welding code; the laser only preps the surface, it does not certify the weld.

Laser paint removal in the Bay Area is a technician on the job. The day rate is $800/day on [services](/services). A Bay Area body shop stripping failed epoxy or polyurethane before recoat runs into a VOC cap near 50 grams per liter on solvent surface prep and spray-line cleanup, and older methylene-chloride paint strippers are barred from sale to industrial users after state toxics regulators listed the chemical as a priority product. A pulsed near-infrared laser removes the coating layer through thermal stress rather than solvent action, so shops can strip [aluminum](/materials/aluminum-laser-cleaning) panels and [steel](/materials/steel-laser-cleaning) frames without touching that VOC limit or generating stripped-paint waste. The exception is thick marine-grade epoxy built up over several coats, where repeated passes near rivets and seams can discolor the substrate unless the operator drops pulse energy and adds a cooling pause between rows. Shops already running [rust](/applications/laser-rust-removal-bay-area) or [lead paint](/applications/lead-paint-laser-removal-bay-area) removal on the same line can cover all three [paint coating](/contaminants/paint-coatings-laser-cleaning#substrateMatrix) jobs from one machine instead of separate chemical-stripping stations.

Laser cleaning removes iron oxide rust from steel down to bare metal without grinding wheels, abrasive blasting, or chemical strippers. The beam ablates the oxide layer while leaving sound steel underneath intact, so a part keeps its original dimension and surface finish through cleaning. It will not reverse pitting the rust already caused, repair corrosion damage done to the substrate, or clear a part in one blanket setting; rust depth and iron oxide type both change how many passes the surface needs before it is ready for inspection.

Laser cleaning decomposes mineral oil, synthetic lubricant, and machine grease off steel, aluminum, and stainless steel through fast thermal breakdown of the hydrocarbon film, the same damage-threshold logic that broader laser-cleaning threshold research has documented across very different host materials (Journal of Cultural Heritage, 2000). It is not a substitute for a wet alkaline line degreasing a full rack of parts at once, and it will not clear a bonded hard coating or a thick paint stack sitting on top of the oil.

Requires matching the paint system and substrate pairing before setting energy, because a thin single topcoat on [steel](/materials/steel-laser-cleaning) clears at a fraction of the fluence a multilayer primer stack on [aluminum](/materials/aluminum-laser-cleaning) needs, and the substrate sets its own ceiling once the coating is gone. Paint sits as an applied, cross-linked polymer film bonded by mechanical keying and resin adhesion, not a corrosion product, so pigment load and binder chemistry decide more of the setting than the substrate alone. A surface-integrity study on laser-cleaned aluminum alloy carrying a paint layer documents that a visually bare finish does not by itself confirm the metal underneath escaped the pass undamaged (Applied Optics, 2024).

Laser cleaning removes the straw-to-blue heat tint film from a stainless weld bead and leaves the surrounding parent metal untouched. It is not a substitute for a post-weld corrosion sign-off, and it will not remove heavy slag or mill scale sitting on top of the discoloration.