Epoxy primer over sand and fill?

[skud007]

Hello all!

I'm new to the game of painting and I am planning on painting a motorcycle frame and tins. I am really glad I found this forum and wish I had read through the posts a little more before letting my neighbor help me! He isn't familiar with etching and epoxy primers.

The motorcycle parts were bare metal. Sprayed some dupont sand and fill and did the bodywork with bondo. I am really worried about corossion protection now. Can I go ahead and spray some dp40 epoxy primer over the fill and sand?

I have the parts all smoothed out as of right now with the fill and sand and are ready for paint. Just wondering if it is going to be enough protection? Am I going to have to resand everything, epoxy, then fill and sand? I believe I should have put the dp40 on first /ubbthreads/images/graemlins/newbie.gif

 

[skud007]

I also forgot to mention that I wet sanded the fill and sand down with 800 grit. This is where the bike is now in the process. If I do shoot the epoxy over it will I have to rough it up a little coarser or will this be ok? My plans in the next couple days are to shoot the epoxy(dp48lf)then hit it with my HOK bc-25, then my sunset pearl, and then go with some orion silver flames. According to the tech sheets of the dp48lf it can be used over a surfacer. Any suggestions or advice would be greatly appreciated.

 

[Jim]

I think epoxy would be a waste of money at this point,If the metal was clean and dry,you should be ok but,an etch or epoxy over bare metal would of given you much better protection.

 

[skud007]

Thanks for the reply jim. I had already bought the epoxy. I just wish I would have sparyed it first (should've read more of the forum first!). I think my neighbor was reluctant to use it because he didn't know about epoxies and was more familiar with the fill and sand.

I already shot it with the epoxy to see how my air compressor would do. I may end up getting a new compressor!LOL

After shooting the epoxy I though the tank and rear fender was pretty flat, but there are some waves, So I'm gonna fill it, block it, surface prime, and block some more.

 

[Jim]

Try to sand it as flat as you can before adding any more filler or primer,you want to keep everything as thin as possible including the paint.