Practically Classics Forum

Hello all
I seem to remember reading somewhere that you can get a type of primer that acts as a barrier over whatever paint you have on your vehicle that allows you to paint over it with cellulose and avoid any nasty paint reactions,I am currently doing a lot of welding on a bedford ca and the interior footwells and dash have been hand painted with I know not what, as they are quite a complex shape with loads of nooks and crannies Its not possible to totally strip all of the old paint off as I just can't get into it all but I got most of the dash back to bare metal and applied celluolse but near the edges the paint reacted with the stuff that was allready on the panel and wrinkled up.So has anybody heard of this barrier paint and is it any good? failing that what about something non reacting that can be applied with a brush???

Cheers Keith.

I think you mean acid etch primer, I always use UPOL but think they are all pretty similar. Must be honest the UPOL has never given a bad result

No, acid etch primer is for application to bare metal, it bonds with it very strongly (the "etch" bit) I use loads of it, excellent stuff - but it's not a barrier paint.

Ah perhaps not then mate, sorry.

hi it's called barcoat made by upol most paint factors should stock it or plenty on ebay , i have used it over many problem paint surfaces to very good effect

That's the fella!

http://www.refinishsystems.com/product/ ... ngIsolator

Been trying to remember what it's called since my last post, and failed miserably. That stuff would work I guess.

Cheers,

Barcoat's the stuff- looks rather nice when it's on as well, a sort of greeny goldy shade You must coat over it pretty quickly however as it absorbs moisture.

What you need a "Sealer". This is usually an epoxy primer can be applied on bare metal to seal the body in it's activated state, or can be reduced and used as a "sealer" that can be applied on an existing paint job in order to seal the old paint from the new paint. Production paint shops here in the US use it all the time in order to prevent reactions.