13 replies to this topic

[hainzy]

Hi all.
As discussed on here a while ago I have a mandarin red LX which has been painted dark red. Im doing a backyard paintjob and just planning on sanding back the paint a bit then priming/hi fill etc over the top. All rust has been fixed and is in etch primer.

Where the previous paint is good, is it ok to just sand it back a layer or 2 with 80 grit and/or wire brush, then prime/hi fill over the top? Is it best to go back to the mandarin red layer or is it OK, as a mate has suggested; to just use 80 grit to take the gloss off and make a decent key in the paint and spray over that?

I realise that back to metal is best, and thats happened in a few spots, but overall Im not going for a show job, juist a backyard respray back to the original colour.

Heres some pics to illustrate what im talking about.

Cheers.

[hainzy]

i'd go 120/180....tends to feather the edges more
so long as it ain't cracking and your not mixing enemel with acyrlic you'll be fine

Thanks mate. So 80 is a bit too harsh on the edges? Would 120/180 still be a nice enough surface key to paint over?

[hainzy]

120-180 would be fine for the key.

so long as the paints not peeling you can go back over it. If your sanding it and the edge keeps "chipping" away then its no good and needs to come off back to the next layer.

Cheers.

Thanks Bomber. The paint on there seems very good in most places. The shot of the plenum is an area ive gone over quickly with the wire brush but not the sandpaper yet so still looks flakey. Other areas the paints in good nic so thats good to know. I'll keep flakey in mind as my key word. Pardon the pun.... Cheers.

[Indy Orange]

Apologies for the hijack....what about 2k over acrylic?

My car was painted just over a year ago now ,the painter sprayed 2pac over acrylic but used whats called an "isolator "in hindsight i should have insisted on acrylic as this is what i originally asked for ,but anyhow as i said this was over a year ago now and shows no signs of cracking ,delaminating or whatever ,the paint cost me $5000 all the preparation before painting was done by myself ,so far so good ,if i was doing it again i would have gone acrylic over acrylic or back to bare metal.Maybe if its done right its ok?

Edited by Indy Orange, 10 November 2012 - 08:53 PM.

[Indy Orange]

Automotive paint coatings and isolators have come along way since the days of enamel paint ,i had the isolator applied over good condition acrylic and then 2pac ,as i said i haven't had any problems ,it was done by a spray painter panelbeater .Good preparation is the key. But if i had this done again i would go bare metal i think.