David Jenkins
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| posted on 14/8/04 at 04:46 PM |
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Watching paint harden...
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
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locoboy
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| posted on 14/8/04 at 04:50 PM |
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a couple of Viagra in the gun bowl should have it hard in no time 
ATB
Locoboy
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Chris_R
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| posted on 14/8/04 at 06:17 PM |
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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.
A bit of slapstick never hurt anyone.
http://www.chris.renney.dsl.pipex.com/
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Mark Allanson
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| posted on 14/8/04 at 06:26 PM |
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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.
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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David Jenkins
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| posted on 14/8/04 at 06:38 PM |
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quote:
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.
I suspect that you're right, Mark.
I'll just have to leave the car out in the warm sunshine and hope that the underlying layers can get their solvents out!
rgds,
David
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Mark Allanson
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| posted on 15/8/04 at 06:43 PM |
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The sun is the best UV lamp you can use, and its free!
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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flyingkiwi
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| posted on 18/8/04 at 09:27 AM |
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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)
It Runs!!!!! Bring on the SVA!
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