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Old 19-11-2006, 04:30 PM   #1
w8cmp
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Default Bl**dy release agent !

Just primed my resin Dark Star model in the garden with Halfords white primer. And while I thought I'd effectively rubbed down every part of her, there appears to be one section of the hull which is rejecting the primer much like solvent does with oil.

Could this be some sort of release agent reacting with the paint ? I'm surprised as I said I've rubbed it down extremely well and thought I would have got rid of any residue.

Anyway, my question is what you'd recommend to sort this problem out. Any particular chemicals ? Cellulose thinners, turps, white spirit etc ? It doesn't matter too much at this stage because it's only a primer coat and I can continue rubbing her down, but when it comes to the top coats I do want the finish to be reasonable...

Cheers

Chris
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Old 19-11-2006, 05:01 PM   #2
Eagle
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Odd.

Apart from the PE23, I've never washed any resin parts - just slapped on primer and it's been ok! Then again, I am a self-confessed kit slob!
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Old 19-11-2006, 05:10 PM   #3
TonyB
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A wipe over with white spirit should do the trick.

I have had the odd kit that this has happened to, even after washing in warm soapy water, and suspected that the release agent was to balme.
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Old 19-11-2006, 05:21 PM   #4
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Is it cratering? I prefer to use cellulose thinners followed by white spirit as a belt and braces job but obviously the former tends to eat plastic parts for lunch (though not resin).
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Old 19-11-2006, 05:53 PM   #5
w8cmp
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Yes I'm getting a cratering effect, where the primer pulls away from a particular spot on the model...lots of small circles in particular areas...

I'll give thinners and white spirit a try and re-prime to see what happens.

Cheers

Chris
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Old 19-11-2006, 06:19 PM   #6
DX-SFX
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Sounds like traces of silicon left on the castings. Try given them a bathe in thinners and possibly a scrub with some wire wool once they're dry. Dust an intial coat of paint on first, let it dry and then add a wet coat later. The dusted coat should stop further coats from relocating. Sometimes pinholes in the surface of the resin can promote cratering.
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