Paint problems after 7 years?

[TWINRAY]

The paint on the rear top D/S fender and on the cowling from the D/S fender to the middle of the window is pimpling on my "67.
History:
I stripped the paint off the car with "Wonder Paste". A product I used before when I stripped the paint off the '69. The stripping on the '67 was done in 1976. After that, and I did degrease with Prep Sol prior to the stripping and used fast dry Enamel Reducer to clean up prior to applying primer surfacer. The car was in a garaged (unused) in primer for 14 year 1989. The finish cost of Acrilic Lacquer was applied. I drove the car yearly (summer driving) yearly and all was OK until about 4 years ago. The pimpling started and formed pin head sized "zits." An oily film appeared also.

I scraped the rough surface and now I'm left with a bunch of pinholes. Questions are what caused this after 7 years of driving

 

[JohnZ]

I'm no paint expert, but I think the "apply window" for topcoat over the primer was long-gone after 14 years.

 

[Dave65]

I am also no paint expert but my 65 is stripped and I plan to spray a primer SEALER to seal the fiberglass and keep moisture and other stuff from migrating through the fiberglass, then a primer surfacer (to block sand) and then the top coat (Acrylic Urethane).

The alternative to the sealer is gel coat which I do not want to use.

I did not think a primer surfacer will seal the surface.

At least that is the plan and the logic for the plan.

Dave

 

[IH2LOSE]

I am no paint exspert

But what you are describing I have heard before,I was told that it is the solvents used in paint stripping the car and then cleaning the surface.It does not come back out of the fiberglass untill exsposed to the sun. what I am repeating hear maybee and old wifes tale or urban legend but I chose not to paint strip for this reason.


Also what is the life exspectency of a laqueer paint job? was it cleared?

 

[paintdaddy]

This might be a stupid question but did you sand the primer before applying the paint?And did you lightly sand the bare glass before applying the primer?Also did you wash the stripper off with water or just use the pe cleaner.

 

[TWINRAY]

First, thanks to you buddies that took time out to reply:

To JohnZ: I did "Skuff" the primer/surfacer before the topcoat & probably applied a new light coat of same (with skuffing of the original primer/surfacer) before the topcoat. I will look at an old P/S paint can instructions about applying topcoat. This wasn't an epoxy based primer so I don't think I was under an application window. I do believe this primer had shrinkage so you were actually better to let it stay on a while, maybe not 14 years , and then block sanding.

To Dave65:
I might :duh have used a primer/sealer. While I haven't painted a lot of cars (about 8), I know I have used a primer/sealer in the past but can't remember exactly on the '67. I would hope that I did but will check my '67 folder and see if I can find the receipt.

To IH2LOSE:
Life expectancy of acqrilic lacquer paint ? Being that this car is garaged and the usage I give it, basically indefinate :cool
No clear coat applied.

To paintdaddy: Are you the guy who dated JLo
Yes, primer sanded before paint. I put the stripper on, let it start to lift the paint and then scraped it off with a putty knife. Used water from a running hose and #320 wet/dry to clean up, then used #400.

To all: paint job in all other areas has no problems and looks really good

 

[paintdaddy]

Are you the guy who dated JLo

Oh I wish. Well ,the paint problems could be a number of things or it was just at the end of its life.Lacquer is the lowest quality of paint nowadays.It looks awsome when first done,it just doesnt hold up.Also ,Lacquer primer isnt waterproof like todays epoxy and urethane primers.If you wet sanded the primer it could have dampened the fiberglass beneath it but it would have to have been wet for a long time for that to happen.The other is that maybe the bare fiberglass wasnt completely dry before priming it.If I had to blame it on one thing I would say it has just came to the end of its life.

 

[TWINRAY]

paint daddy - You may be right but I don't think it had to do with the lacquer coming to the end of its life. I painted my '69 in the late 70's and drove it till 1989 (it was then in storage until last year) and I used the same procedure. There are no issues with that job. I think you are right when you say it could be a number of things. The oily nature makes me think the preparation underneath was "f---ed up" somehow:CRASH . Maybe when I take it down to the bare glass I'll see something:L