[dave4943]

Is it ok to use etch primer over metal to metal and other bondo or should I etch prime first and then use bondo and metal 2 metal?
Any reccomendations would be very appreciated.
thanks.

[kenseth17]

Possibly not okay to do either one. You have to get a hold of the p-sheet for your etch primer. Some say its okay to use fillers over and over filler, but most have strict warnings to not do either. Self etch and polyester don't mix. If you are determined to use an etch primer and yours has warning against use of body filler, I would spray down your etch first, then follow that with a coat or two of epoxy primer within the time window to avoid having to sand for adhesion. What brand self etch are you using? Many P-sheets are available online, and they contain a lot of information about use that you should be aware of. Don't just go by the little bit that is normally written on the can. If your metal is clean, sanded and free of rust, I would just use an epoxy primer and skip the etch. Filler and epoxy is very compatable, and epoxy has good adhesion to bare metal.