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Since Im very close to painting my tub I fount out some more specific info...here are the specifics that Bob from aqualu sent to me
Procedures for Prepping & Painting Aluminum Using PPG Products
· Perform all required bodywork first (filing/ grinding act.)
· Degrease entire area using DX 320 or DX 394 there is no need to use both products. (Wipe off while product is wet with a clean dry cloth)
· Sand aluminum using 240 to 320 grit sand paper and using a 3M red scotch bright pad to sand any areas that you cannot reach with sandpaper.
· Degrease entire area again using DX 320
· Blow off entire area with compressed air and tack with a tack cloth.
· Apply 1 coat of DX 1791 this product is very thin do not try to achieve coverage this product is a chemical etch product. (Use as per P sheet recommendations) Allow to flash (dry) for 15 min before next step
· Apply 2 coats DP series primer (allow drying time of 30min before applying Hi build primer on top of this. (Use as per P sheet recommendations)
· Apply 3 coats of K38 or DPS 3055 primer these products will take out any minor imperfections before being painted (must be sanded before being top coated 400-500 grit sand paper) see P sheet for drying time before you can sand these products.
· After thoroughly sanding all areas degrease with DX 320 or DX 394. Blow and tack all areas.
Paint with desired topcoat DCC urethane topcoat or DBC base coat follow P sheet recommendations.
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