prep-all removing primer?

[dkimball]

I'm painting some plastic motorcycle fairings. They were already painted (from the factory that way).

I've scuffed them with the red 3M pad, and primed them with the sandable primer. I then wet sanded them lightly with 1000 grit, just to smooth them over before the color coat. After sanding, I sprayed some prep-all (wax and grease remover) on them to clean them. What happened was the primer literally just liquified and wiped right off the plastic parts. Not a spec of pimter left on the parts. It was like the prep-all just washed the primer right off. Fortunately, I only sprayed one part. So the rest still have primer on them.

Question - was that the prep-all doing that, and I shouldn't use it? or was it that the primer never adhered to the parts? (it was about 24 hours between priming the parts and spraying the prep-all).

If it's the prep-all, then fine, simple to fix (don't use it), but if it's the primer not sticking to the plastic parts, then that's a bit more complicated. Should I have scuffed more? Or used adhesion promoter? or a different primer? And if that's the case, should I remove the primer from the other parts and start again?

Any help would be appreciated....

[Dupli-Color-Specialist]

The Prep-All is too strong for fresh aerosol paint. If it were a 2 part primer then it would be fine. After wet sanding, just wipe them down with clean water and they will be fine for painting.

[dkimball]

That's what I figured. I ended up simply using the prep all on all the parts and cleaned them bare again, and started over with some adhesion promoter and resprayed the primer. Then I sanded and washed them. They seemed much better at this point.

I've since done my final painting - white color coat, a dusting of glitter effex, and 4 coats of clear. They look fantastic. Now I'm just letting them cure before I decide if I'm going to sand and buff. There's almost no orange peel on the parts, so it may not need it.

thanks for the help! I'll post a pic when it's done.