MGB & GT Forum

So the final sanding is done and I decided to do a repainting. My first thought was the roller method, but decided I'd try using a HVLP sprayer using Rustoleum enamel. Hood and front fenders went REAL good, will need a final wet sanding but acceptable. When I did the door and rear fenders the paint under the new spray winkled and blistered. I know this car had a BAD touch-up / repaint which I sanded pretty well. My guess is thee is a compatability issue between the paints. My only hope now is let it dry good, do a HEAVY resand and prime and hope to get a good second coat. Blistering seems to be just random patches.

If anyone has any other ideas I'm open.

This is why they sell sealer coatings. You are picking up on an "Edge" where you feathered out several layers of coatings.

Pete

For now I went out with a paint scraper and removed as much blistered paint as I could. I'll let it dry and sand in a day or two. Odd thing is primer and first light coat went on good.

you are correct you are spraying over an incompatible paint. What has me concerned is If you have properly prepped this shouldn't be an issue. Did you lay down a primer coat before spraying the car with this enamel? For our cars the best advice I can give for folks doing their own paint is buy all your paint from the same company such as PPG. Buy some guns and practice with them painting your fence or a cardboard box.
Strip the car back to bare metal If you can spot blast rust areas with a mini blaster other wise sand vigorously and use metal prep.
Prime with an epoxy primer and then lay on your filler and sand-able primers. Top coats and sealers go over primer and nothing else this includes fillers and skim coats and filler, other wise you may see a reaction and have to rework an area.



Edited 2 time(s). Last edit at 2014-09-17 04:39 PM by MGJared.

Yep...

That's reàlly not odd, it's how it normally happens - although I know why you would say it is odd. The primer has a higher solid content and is less prone to lift the paint underneath. The first light coat didn't put as much paint ( and therefore solvent ) on the surface, so still no lifting. The solvent in the first full wet coat that you put down travelled through the first coat, found the edges that NOHOME described, and wrinkled those areas.

Prime again and sand without cutting through and you'll be golden when you paint it.

pm sent

Fixed it for you.

hello steve
I did my car with rustoleum also, it has held up awesome for 2+ years now I used rustoleum auto primer with no problems. I did buy a gloss enhancer and hardener and added it to the paint, I found that out on a paint with rustoleum site. I'm not sure where you live but I got the additive at tractor supply well don't give up and good luck oh I forgot to say I also sprayed mine with a hvlp also. heres a couple pics

Billy, THATS what I'm looking for. Unfortunately this ISNT my primary hobby. I was looking at two old John Deeres and my wife realized I needed a 'project' and found this orphan. Looked pretty good until I pulled the rocker covers. Replaced inner, mid and outer rockers both sides, floors, one cross brace, front and rear dog legs on both sides over the past two years. DID I SAY THIS ISNT MY PRIMARY HOBBY? And I don't really enjoy working on cars? She's an evil woman (not really).its a $2000 car with $1000 in parts. If I can get by with a $150 paint job I might not be under water too bad on my 'project'

if there was one thing I learned about my recent repaint, buy all the stuff, primer, paint, reducer, hardener, prep-sol, whatever from the same vendor. Period.

And if in Calif, stay away from Summit Racing. they do not offer a complete set of the stuff you will end up needing.

my 2¢ worth

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1973 Pale Primrose Roadster. A nice 10-footer!
SUs, Datsun 5-speed

I just did my car with Krylon Dual rattle cans... 18 of them. There are two nozzle types on those cans the one with the protruding nozzle that can be rotated is great. Really. lays down a predictable thin oval about 5" wide. The other nozzle is a spot about 3 or 4 inches around and spatters quite a bit as well as laying down inconsistant paint volume causing a few runs. You can see the difference on the car if I show you.

If my technique was a little better, and all the cans had the protruding nozzle it would be awesome instead I have a nice 15 footer.

The color is officially Banner Red... We call it "Ticket Me Red"

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Michael J. Caputo
'79, '77, '76, '74.5 (rubber dual SU), and '73 owner. Extensive experience in 12v Audio System design and installation. Vendor of Regalia and Promotional Products since 1993. Supplier of Accessories to MOSS. Forum Member since 2009; with a warped sense of humor since birth. Publisher of the annual MGB & GT Calendar, mailed worldwide.

LOL! Krylon Dual rattle cans! I wanna see pictures of the result!

Keith

Well I might have dodged the bullet by scraping off the blistered paint while it was wet. Waited two days then sanded the areas, primed and sanded twice more and top coated. Everything dried fine second time around. Moved on to the rest of the car, all that's left is rear valance are remounting all the lights.