6 replies to this topic

[minbin 69]

ok so i stripped it back to bare metal..gave it a good clean with pannel wipe..coat of krust...wiped...etch primer...wiped..primed and now its cracking in a few place..anyone got any idea why/what i've done wrong?

 

 

 

[Daz1968]

What type of primer is it and did it do it on first or 2nd coat, as if its on 2nd coat you maybe overcoating before its flashed off and the thinner from 2nd coat is softening first coat. I recently used some upol high 5 and it did this very easily. Or you could just be applying it to thick as this is also common with high solvent paint.

[minbin 69]

thanks Daz they both sound like things i do i'm useing upol high 5 aswell..just this was the first time it cracked like that..

so i guess i'll be stripping it off and starting again..but being more careful this time..

[Daz1968]

Sounds exactly what I did with it, just flat it with p320 dry until all flat, a guide coat will help with this then apply a few more coats but lighter coats and make sure it has flashed off properly before over coating. It was first time I had used an aerosol and I can only think it because of the amount of thinner to make it spray as you just can't put a heavy coat on like you can with a spraygun but after I had changed my technique it was fine. It does sand nice though once fully cured but at £12 a can Dont think I would use it on large repairs.

[minbin 69]

just checked it's upol p88 i'm using..think my spraying technique needs a lot of work :) thanks again for your help

[Daz1968]

I would put less thinners in next time and make sure fully flashed off before over coating but I am still learning myself so maybe others might have further advice. Hope it works out for you.

[minbin 69]

think i may have found the problem..turns out i've been using 2k etch primer and 1k primer