can it be used over surface rust ?

Yes! But it’s probably better to wire brush as much rust off if possible. It will stop rust from forming more. I’ve sprayed 4 vehicles with it

can you please tell me what air gun will work best with this product i would like to buy this in bulk

Any undercoat gun will work. Use a regulator to fine tune the air pressure

What are the air compressor requirements (e.g Gallons, psi, sfcm) to undercoat a mid size sedan? Will be using woolwax sprayer.

70-90 psi no smaller than 3gallon compressor tank. The smaller the compressor harder the it’ll work to keep up. Hope this helps.

Can this be used on aluminum trailers?

You can apply the surface shield to any surface including aluminum. It's a lanolin based product.

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🛠️ Shield your gear like a pro—bulk rust defense that works as hard as you do!

RUST STOPS HERE - Creates a durable moisture barrier that prevents rust before it even starts—perfect for vehicles and outdoor gear.
GARAGE FRIENDLY FORMULA - Mild cedar scent and low odor make it easy to use indoors without the harsh chemical smell.
BULK COVERAGE FOR BIG JOBS - One gallon of heavy-duty protection means fewer refills and more uninterrupted work time.
SAFE ON SENSITIVE SURFACES - Protects metal without damaging rubber seals, plastic trim, or wiring—versatility that professionals trust.
CLEAN DRIP FREE APPLICATION - Smooth, even coating with no mess—apply confidently with brush, roller, or sprayer.

B'laster 128-SS Surface Shield is a 1-gallon, lanolin-based rust prevention undercoating designed for large-scale projects. It forms a moisture-blocking barrier that protects metal surfaces from corrosion, while its low-odor, cedar-scented formula is safe on plastics, rubber, and wiring. Ideal for vehicles, trailers, mower decks, and more, it offers a smooth, drip-free application for professional-grade, long-lasting protection.

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Manufacturer	B'laster
Brand	Blaster
Model	128-SS
Package Dimensions	22.1 x 21.41 x 18.9 cm; 3.96 kg
Item model number	128-SS
Manufacturer part number	128-SS
Item Weight	3.96 kg

B'laster 128-SS Surface Shield Bulk 1-Gal Pail, Multi

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