Friday, October 2, 2009

Hammerite Rust Cap Paint FAQs

What type of application tool can be used to apply the Hammerite Rust Cap paint?

A synthetic bristle brush, ¼” mohair roller, is recommended for flat surfaces. Brush irregular surfaces. Do not overwork coating.

Can Hammerite Rust Cap paint be sprayed?

Airless Spray Gun: Pressure: 1800 – 2800 psi
Tip Size: .017” - .021”

Conventional Pressure Pot: Pot Pressure: 15-20 psi
Atomizing: 25-35 psi
Tip Size: 70-80 thousandth

What surface preparation is needed?

Remove all loose rust, paint and mill scale, by scraping, sanding or wire brushing the substrate. Remove all dirt, oil, grease, salt contamination from ocean or street salt, and mildew, using an approved cleaner, fresh water and a commercial mildew remover. Rinse surface thoroughly and let dry before continuing. Smooth or hard, slick surfaces must be deglossed or abraded by sanding or grit blasting. A new or clean metal surface that is very smooth and/or glossy, or non-porous MUST be sanded with a minimum 80 grit sandpaper. DO NOT use any rust converter, or any other acid or conversion type product to clean or prepare a rusted surface before applying a Hammerite coating. Aluminum and galvanized surfaces require a prime coating of Hammerite Galvanized and Aluminum Primer.

Professional painting practice requires previously painted or shop primed surfaces must be 'patch' tested for compatibility. Apply Hammerite to a small area and expose for 72 hours minimum and check for adhesion and any signs of lifting or cracking, etc.

How many coats should I apply?

Apply two or more coats as needed to achieve the 4-mil dry film thickness required for maximum rust and substrate protection. For brush/roller method, all hammered coatings must be applied within 4 hours or after 14 days of drying. All smooth coatings must be applied within 4 hours or after 72 hours of drying.

For aerosol use, all hammered and smooth coatings must be applied within 1 hour or after 10 days of drying.

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