Primer Cracking
MikeWz
05-09-2005, 01:30 PM
Okay, does primer usually "crack"? I did a quick light coat for the first coat, let it dry over night. It looked like it was cracking around the rear bumper. Sanded it out a bit, washed it off and let it dry for 24hrs. Next day I brushed it off and blew it off just to make sure. Went out and did a heavier "cover" coat. Got some more cracks on it. Is that normal? Will I be able to just kinda sand them out and hide that in the final coats?
Ferrari TR
05-09-2005, 01:45 PM
I learned something the other day...
I stripped the paint off a body with CSC and the only place the primer really stuck was on the places I had done body work (filled and sanded).
So, on my next project I sanded the body with some very fine sandpaper (1600) before priming.
Your problem may be due to mold release left on the body or even due to body oils from handling the parts before painting.
You've already tried to re-coat the parts, so stripping or sanding to bare plastic is the only thing I would try.
:p
I stripped the paint off a body with CSC and the only place the primer really stuck was on the places I had done body work (filled and sanded).
So, on my next project I sanded the body with some very fine sandpaper (1600) before priming.
Your problem may be due to mold release left on the body or even due to body oils from handling the parts before painting.
You've already tried to re-coat the parts, so stripping or sanding to bare plastic is the only thing I would try.
:p
MidMazar
05-09-2005, 02:19 PM
yeh definetly thouroughly sand the entire model, then wash it, then once dry spray primer, btw what type of primer are u using?
MikeWz
05-09-2005, 02:19 PM
Well, I did sad with wet 800, then 1200 paper before the first coat. When I was handling the car, I only held it from the inside. That's kinda weird!? Maybe my primer is just no good :confused:
Vric
05-09-2005, 02:41 PM
Maybe the first coat was too tick.
what brand of primer do you use ?
what brand of primer do you use ?
MikeWz
05-09-2005, 02:59 PM
It's a company called midwest http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXAU99&P=ML
klutz_100
05-09-2005, 03:22 PM
hi!
why don't you try this insted from teh same place http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXVC46&P=7 either in grey or white. I've found tamiya primers to be excellent so far.
I'm not sure how the $/oz compares (couldn't do teh math :) ) but they've worked every time for me so far.
$0.02 worth
stevenski
why don't you try this insted from teh same place http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXVC46&P=7 either in grey or white. I've found tamiya primers to be excellent so far.
I'm not sure how the $/oz compares (couldn't do teh math :) ) but they've worked every time for me so far.
$0.02 worth
stevenski
MikeWz
05-09-2005, 03:48 PM
I will try that. Those are what I wanted to buy, but their out of stock until at least mid-may because of the whole labeling problem
klutz_100
05-09-2005, 04:08 PM
oops sorry - I'm in Europe and we don't have that problem (yet). I read about about it but didn't think before I posted - STUUUUUUUUPID of me :(
sorry 4 that
stevenski
sorry 4 that
stevenski
MikeWz
05-09-2005, 05:09 PM
No worries. If you could get me some that'd be great :smokin:
klutz_100
05-09-2005, 05:14 PM
It's ready and waiting - come 'n get it :)!
stevenski
stevenski
fieldmarshal
05-10-2005, 11:53 AM
I suspect its the weather thats causing the cracks on your primer. Check the level of humidity in your area, make sure you don't spray on days with high humidity.
white97ex
05-10-2005, 12:06 PM
i live in texas and the humimidity is always high. lol. i swear by duplicolor primers. i have yet to have any trouble out of them. as long as the body is properly prepped. 4 bucks for a 11 oz can
MikeWz
05-10-2005, 01:44 PM
Yeah....I'm on Long Island. If I have to wait for days with low humidity, I might as well quit now :p
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