Speckles after Spraying

G

GeoffW65

Promoted Users
I have had this happen a couple of times, thankfully on internal parts. This is a picture of a rear body panel that I shot with some epoxy. Never mind the run...I overshot it and it's a non-aesthetic panel (but maybe the heaviness is that's the story). Why does the material occassionally speckle like this while curing. It was smooth for a while, and then started to speckle like this. Is this because I had too much heat on the part while curing?

Any ideas? I just want to avoid this on panels that matter.

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Is this what solvent pop looks like? I used an IR light for the first time because I wanted to get some primer sprayed on this panel and it has been cool overnight. The other time I've had it happen was on some wheel wells that I put in direct sunlight after spraying. That turned them into a textured finished that I just went with because they were wheel wells.

Did I mention I just do this as a hobby?
 
The best thing you can learn in your hobby is patience. I have a cousin that uses me as a tech support line. ALL of his issues can be attributed to impatience in following printed instructions because of his self-imposed time constraints. This is not a cheap hobby to experiment in.

I wouldn't think that epoxy flashes quickly enough to cause any solvent pop. It is normally seen in clearcoat and catalyzed urethanes.
 
100% the heat did it. I primarily prime all of the golf carts I do with epoxy and I hammer on 4 coats and just let it set up for a week. Anyways a few times I left the parts sitting under my heater(tube heater) and the next morning it looked like this. Didn't bother me much since I was heavy sanding the parts any ways.
 
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