Painting over powdercoat

[busastars]

Got a few small paint jobs, switchgear, small head, barrels and bits an bobs. All are in original powdercoat but need a little tlc.

The head and barrels I got single pack acid etch primer and engine enamel for the job, the switchgear etc I got some Plastikote rattle can paint and also bought some clear as I have some decals to put on them.

For the head and barrels can I just key the powdercoat, acid etch primer over the top and then paint, should I just paint over the top with out the primer? When I did my engine cases I stripped all the powdercoat off, acid etched them and two coats of paint baked in the oven, they turned out very nice.

Same with the switchgear, can I key, got some rattle can primer and also as above acid etch primer either or and then apply paint.

Just not sure what to do with the powdercoat'ing, I am doing this with rattle can for quick ease and I have it there, went with engine enamel because of how I wanted it to look.

Cheers

 

[Roger440]

I dont know if its techincally correct, but i prepped and painted my grill frame for my dodge in the normal manner. It sanded down like a good dry thick coat of paint. Etched it the satin black.

 

[Chipper]

Sand the powder and do the colour, just needs a key, maybe primer for a bit of build if you wanted to smooth & sand it first. Etch will do nothing as such, as the acid has no metal to bite into.

Switchgear, could use plastic primer, but normal primer should be OK with a bit of a sand so it can bite. I've done them direct with 2k and an airbrush.
You can use Humbrol enamel in the letter recesses and wipe off excess etc, rang damp with white spirit. My mate has a steady hand and paints them in dead neat with a tiny brush.