paint prep

[Tom K.]

does any one have expereince with contaminants in the fiberglass? i'm trying to paint my 65 roadster myself and have encountered a problem with what looks like fisheye. it is ony occurring at the driver side louver area. a friend suggested it might be brake fluid that escapes the master cylinder. the car was stripped ove 20 yrs ago with a chemical stripper. i'm using an epoxy primer and this is the first coat.

[Stephen L.]

Re: paint prep

Anything with silicone in it could cause fisheye as well as many other chemicals. Somewhere along the line someone may have gotten a little ARMOR-ALL or some such thing on this area. Multiple washings with thinner MAY remove it..... I had a similiar problem on my dash panel. I used a product called Bulldog adhesion promoter and was able to overcome the fisheyes. I don't know if it'll work but its worth a try. You can always wash it off with thinner.

Good luck

[Tom K.]

Re: paint prep

thanks stephen, i've used all those remedies but still no luck

[Dick W.]

Re: paint prep

As bad as I dislike gell coat, it is probably your only solution. Hopefully it is just a few small spots and you can grind them down and just gell coat that area

[Kenny C.]

Re: paint prep

Tom
You likely have some type of silicone contaminate which is very hard to remove from the pours of the glass. I had shop teacher way back who told me he used carbon tet to solve this problem, since they determined that that stuff causes cancer its no longer available. DuPont and Ditzler both make prep products that are supposed to do the trick but it may require lots of scrubbing. Also there are anti fish eye products that can be mixed into your paint to help reduce reaction. Talk to your local professional paint supplier for recommendations and good luck
Kenny

[Tom K.]

Re: paint prep

thanks dick, i'll give it a try

[Rich P.]

Re: paint prep

Tom,

I have had this problem many many times. I have always been able to remedy it by using lacquer thinner sprayed straight from a spray gun. What you do is fill up the gun and spray I mean spray thinner on till it is pouring down. As it is wet wipe with a clean cloth. REPEAT...REPEAT...REPEAT x 10 and each time use a clean rag. Once you have done that you need to apply several VERY LIGHT coats of primer and I mean VERY LIGHT. Let the primer set up and sand repeat this priming process 1 more time and you should be fine.

Hope this helps, Rich

[John H.]

Re: paint prep

Rich & Ken are both right. If you get a chance, talk to a rep from the PAINT co. he can shed some light on the various different products that you don't even think of, that can cause problems,like stuff that is in the air from down the street . Also don't use rags that have had fabric softener on them.