Question for you guys who can paint........Pics

[MHTARSTON]

Painting this weekend using a single stage paint. Painted my Radiator support and it turned out great looks like glass. Painted my fender and I have craters, looks like oil was sloshed on it prior to painting. I did clean the fender with thinner (same as radiator support) and let it dry for an hour. I stopped and will sand and try again another day.... Does anybody know what is going on? Is it prep or paint mix?

Thanks
Mike

 

[MHTARSTON]

Here are the pics of the painting

 

[Dieseler]

It looks like you may of had contamination in your lines do you have a seperator/air dryer in line,very important to keep oils and moisure out of the lines.

 

[MHTARSTON]

I did have a filter/water separator in the line.

 

[motomodz]

potential causes

the thinner should have removed any contaniments, if there is no moisture or tool oil in the air lines then, it looks like there may have been some silicone in the area (make sure a freshly armor-all'd tire is NOT nearby!) or you are experiencing "fish-eye"......the paint shop that supplied you with the materials should be able to suggest a fish-eye eliminator that is compatible with the paint you are using. You may also want to try using a small filter attached to your paint gun in conjunction with whatever other filters you have at the source of the air (air tool oil could have gotten into you air hose) Hope that helps, let us know how you make out!

 

[Texx]

Thinner is not an acceptable prep/grease remover. By nature it reacts with paint. You need a specific grease/wax remover such as prepsol. You wipe on the prepsol with one cloth, and immediately wipe it off with another. I'm gonna say surface contamination, oily hands touching the already prepped are, or the like, instead of line problem. Problems with the line/gun tend to be all over. You have a specific area. Bad news is, you'll have to sand back down to recoat.

 

[MHTARSTON]

I think my prep was half ass. Really going to try and clean better this time.

 

[baxter650]

Silicone and oil remover, go over the whole vehicle a few times with fresh clean lint free shop towels.

 

[fieldsken1]

get some stuff i used to use its called finalwash works good dont know if they still make it

 

[CDNCruisers]

Common signs of most paint contamination

The tell tale large random contamination patterns on you paint job looks like you didn’t wash the surface properly, a good product to use on occasion when contamination is a problem is "Smoothie", it works with most single stage paints and "Smoothie 2" is for most post catalyzed paints.

I always try to wash & clean everything and use dry oil free air, clean the gun and filter the paint ect… but if all that still isn’t enough this products is a big help,

After you give your fender a little bit of a resand try this stuff im sure it will help.

Bad oily air tends to contaminate the entire painted surface evenly in small crater type pin holes, Wet air usually will make small pimple type holes or a dusty look over the entire freshly painted surface.

Good Luck