Best Sandblasting Media by Application: Steel, Aluminum, Wood, Glass & More

Best Sandblasting Media by Application — Material-Specific Recommendations

Different materials demand different blasting approaches. What strips rust from steel in minutes will destroy an aluminum panel in seconds. This application-focused guide tells you exactly which media, grit size, and pressure to use for each specific material and task — no guesswork, no damaged workpieces.

Written by Charles Rosenstein, Le Lematec / Factory Direct — over 15 years formulating media recommendations for professional surface prep applications.

Quick Reference Chart

Steel & Iron Applications

Heavy Rust on Mild Steel

For deep rust, scale, and heavy corrosion on structural steel, trailer frames, and equipment: aluminum oxide, 60–80 grit, at 80–100 PSI. This is the most aggressive commonly needed setup. The angular aluminum oxide particles cut through rust layers fast and create an excellent anchor profile for primer and paint. Our Brown Corundum media in 220 grit handles finer work on the same steel after the heavy rust is removed.

Hardened Steel & Cast Iron

Hardened tool steel, heat-treated parts, and cast iron are too hard for efficient aluminum oxide cutting. Step up to silicon carbide, 60–100 grit, at 80–100 PSI. At 9.5 Mohs, silicon carbide cuts these hard surfaces efficiently. Our 100-grit Silicon Carbide is the go-to for demanding metal prep.

Stainless Steel Finishing

Stainless steel needs gentle treatment to maintain its corrosion resistance and appearance. Glass bead, 100–170 mesh, at 60–80 PSI creates a uniform satin finish without removing material or creating profile that traps contaminants. Never use steel-based media on stainless — embedded iron particles cause galvanic corrosion.

Weld Cleanup

Post-weld cleanup (removing discoloration, spatter, and slag) calls for aluminum oxide, 80–120 grit, at 70–90 PSI. This removes the heat-affected zone discoloration and creates a clean surface for coating without excessive metal removal.

Aluminum & Soft Metal Applications

Aluminum Cleaning & Finishing

Aluminum is soft (2.5–3.0 Mohs) and scratches easily. Hard media like aluminum oxide or silicon carbide will gouge, etch, and warp aluminum parts. Use glass bead, 100–200 mesh, at 40–60 PSI for cleaning and finishing. The spherical glass peens the surface to a uniform satin finish without removing material.

Aluminum Paint Removal

For stripping paint from aluminum without damaging the base: baking soda at 30–50 PSI. The soda crystals dissolve on impact, lifting paint through energy release rather than abrasion. Zero risk of warping, etching, or dimensional change. Use the AS118 Soda Blaster for this application.

Copper, Brass & Bronze

Similar to aluminum — soft metals that scratch easily. Use walnut shell or glass bead at 40–60 PSI. These clean tarnish, residue, and light corrosion without altering surface dimensions or finish quality.

Automotive Applications

Body Panel Paint Removal

Thin automotive sheet metal (20–22 gauge) warps easily under aggressive blasting. Baking soda at 30–40 PSI is the safest method — it strips paint without warping panels, etching glass, or damaging chrome trim. You can blast directly over windshields, rubber seals, and emblems without masking.

For faster paint removal on thicker panels (fenders, doors), fine glass bead, 170+ mesh, at 50–60 PSI provides more cutting action while still being panel-safe.

Engine Component Degreasing

Cylinder heads, intake manifolds, valve covers, and pistons accumulate carbon deposits and baked-on grease. Walnut shell, 12–20 mesh, at 40–60 PSI removes carbon and grease without altering machined surfaces, removing metal, or changing tolerances. This is the standard method used by engine rebuilders.

Wheel Restoration

Aluminum wheels: glass bead, 100 mesh, at 50–70 PSI. Steel wheels: aluminum oxide, 100–120 grit, at 70–90 PSI. Always match the media aggressiveness to the wheel material.

Wood & Delicate Substrates

Wood Paint Stripping

Walnut shell, 12–20 mesh, at 30–50 PSI removes paint from wood without gouging, splintering, or raising excessive grain. It's the gentlest effective paint removal method for furniture restoration, architectural woodwork, and log homes.

Fiberglass

Walnut shell or baking soda at 30–40 PSI. Fiberglass gel coat is thin and fragile — hard media cuts right through it. Walnut shell and soda remove paint and contamination without damaging the gel coat layer underneath.

Glass & Stone Applications

Glass Etching

Silicon carbide, 120–220 grit, at 40–60 PSI creates clean, precise decorative etching on glass surfaces. Fine grit produces smooth frosted finishes; coarser grit creates deeper texture. Silicon carbide's hardness (9.5 Mohs) is essential for efficient glass cutting — softer media just bounces off.

Stone & Concrete

Cleaning stone facades, removing graffiti from masonry, and preparing concrete surfaces: aluminum oxide, 60–80 grit, at 70–90 PSI for aggressive cleaning. For historic or decorative stone where preservation matters, use baking soda at 30–50 PSI to clean without surface damage.

Equipment Recommendations

For all applications above, you need a quality sandblaster gun, clean dry air, and the right media. Here's our recommended setup by application type:

• General workshop (rust, paint, weld cleanup): AS118-2 Dual-Feed Sandblaster + aluminum oxide media + filter/regulator
• Automotive restoration: AS118 Multi-Media Blaster + baking soda + glass bead
• Precision/detail work: Handheld Sandblaster Kit + Long Nozzle Attachment + fine-grit media
• Hard metals/glass etching: AS118-2 + silicon carbide media
• All setups: Add an inline air filter and desiccant dryer for consistent results.

For the complete media comparison with cost analysis and reusability data, see our Sandblasting Media Comparison Guide. For air supply sizing, check the CFM & PSI Requirements Chart.