Problem of 3 years old primer in spray can

[joecwlaw]

guys, I like to ask if anyone experienced in using Spraycan Primer which has been idle for 3 years?

I used the spray can for primering my bimmer, and today I found some cracks on the spray areas. Is it related to the weather? The humidity is pretty low these days. It seems strange to me because I sprayed the primer 1 week ago, and it has already dried after few hours later, but it turns crack after 1 week?

The only thing I can think of is that I idle the spray too long. yaya, my paints have been sit here for 3 years, I never think I will ever post a project as my friends said, but finally I started this hobbies again!

p.s. Before spraying, I already warm and shake the spray can well in faq.

[white97ex]

did you use any putty? the putty might have cracked if you did

[joecwlaw]

Originally Posted by white97ex

did you use any putty? the putty might have cracked if you did

it is cracked on the area without putty.

[Verminator]

Sounds like a plastic/solvent reaction problem. What type of primer was it?

[joecwlaw]

Originally Posted by Verminator

Sounds like a plastic/solvent reaction problem. What type of primer was it?

tamiya grey primer straight spray from can.

[Ferrari TR]

There might be a problem with your prep.
A light sanding and a good cleaning is important. I've only had problems with primer sticking to metal though, and that was when I sprayed the initial coat a bit 'dry'.