cracks opening in primer

General Discussion. Make yourself at home...read, ask and answer!



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PostPosted: Thu Sep 15, 2022 11:47 am
you might try this, sand down past your mapping problems (a must.) then get some water born primer (water base) and apply a couple coats as per user instructions (nearly the same as regular primer,just different dry times). let this dry as per inst. then lightly sand and go to your color coat med wet, no epoxy. the water base primer is the last thing that will least react to your base material. the other way will be to remove all the coatings down to the plastic.
Jay D.
they say my name is Jay



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PostPosted: Thu Sep 15, 2022 5:37 pm
mini64 wrote:Dennis,
Maybe a silly question, but if I'm painting several coats over several hours, i should empty and clean my gun between every coat, right? The epoxy has an 8 hour pot life but i would think the parts in the gun internals cant sit that long without drying/clogging.

Thanks for the help! Sanded last night. Spraying this evening into the night.


I was wondering if you would be worried about that, I have left epoxy in my guns for a very long time The epoxy I use has a much longer Pot life though.

If your worried dump it in a cup run and run some thinner through the gun and let it sit with the thinner in it, I do it all the time. Then when your ready pour the thinner out & just pour your epoxy back in and squeeze trigger till thinner is gone and paint starts coming out hook up your air and spray again. remember just fog it on in super light light coats.

I like Jay's idea of using water born primer :wink: thats a good one! never thought of trying that!!!!!
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.



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Posts: 5707
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country:
USA
PostPosted: Thu Sep 22, 2022 3:51 pm
Any updates???

As a side note Polyvance makes a Waterborne primer just for plastic / rubber bumpers and a special sealer all for plastic bumpers.

Their primer
https://www.polyvance.com/Waterborne-Primer-1/

Their Sealer, the sealer is a 1k product :cry:
https://www.polyvance.com/Waterborne-Sealer/
Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.
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