BARE METAL PREPARATION

There is sanding and metal treatment in this process.

This process is used for rust-pitted metal and old body filler, and bare metal that has been

exposed for more than 30 minutes. One reason may be to create a “tooth” or scratch so that

subsequent paint applications adhere well.

1 Sand the entire part using a DA sander with P120-P180 grit and an interface pad.

Remove rust pits and old body filler.

Clean with approved the appropriate PPG cleaner. Tack off surface.

2 Perform metal treatment* process (reference PDS OC-36 for detailed instructions).

Steel: Use SX579 / SX520

Aluminum: Use SX533 / SX503

CAUTION: Do NOT apply etch primers or body filler directly over these metal

treatment products.

*Cannot be used in some areas due to VOC or heavy metal restrictions. Proceed directly

to epoxy primer.

3 Apply epoxy primer.

REMINDER: When left unprotected, bare steel begins to oxidize (flash rust) after

30 minutes at 50% relative humidity. Sanded aluminum begins to oxidize almost

immediately. Protect with epoxy primer.

4 Complete welding, rust repairs and sheet metal patching.

5 Clean with the appropriate PPG cleaner.

6 Reapply epoxy primer for corrosion protection.

7 Proceed to body work. Refer to the Body Filler Process,