Here's a question for the paint experts - how long does cellulose paint take to harden off fully?

The reason I ask is that I stood my bonnet with nice, shiny, recently painted and polished bump in front of my car while I worked on something else. Left it for a week or so, not realising that the nose of the car was just touching the bump. When I rolled the car back I found a nice dent in the paint!

Tried to polish it back, but had to remove the entire top-coat before it was gone. Had to rub it down and fix it... (nearly finished - top coat to go).

It's a GRP bump, Halfraud's plastic primer (left to harden a day or so) then several coats of yellow cellulose. The cat-arse-trophy happened about 2 weeks after the original paint job was finished.

Should paint take that long to go hard?

David

a couple of Viagra in the gun bowl should have it hard in no time

I did a paint course at one of the local colleges. The guys there said that cellulose never fully dries, not in the same sense that two pack does.

Cellulose never cures, 2K cures because it changes chemically after it has been sprayed. Synthetic cures, it absorbes moisture from the air to make the reaction work.

The problem is probably the flash time between coats, if you are too inpatient, you can trap a partially evaporated layer of paint under a fresh coat. The top coat may dry, but the underlying layer never gets the chance because it is trapped under the top coat.

quote:

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Originally posted by Mark Allanson
The problem is probably the flash time between coats, if you are too inpatient, you can trap a partially evaporated layer of paint under a fresh coat. The top coat may dry, but the underlying layer never gets the chance because it is trapped under the top coat.

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The sun is the best UV lamp you can use, and its free!

What sun????? The only sun I've seen recently has been the one in the news agent! Would be alright if I lived in Florida (hurricane's apart that is)