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Primer for resin parts.

Started by Carlo, April 15, 2019, 12:42:12 PM

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Carlo

I have cast up some parts in Smooth-On 305 Polyurethane Resin., which is white. I'd now like to prime them a neutral gray to look for defects, and get ready for color. I have always used "DupliColor" brand sandable auto-primer with few problems. Now I'm having trouble with paint flaking off at the least provocation. Any ideas or suggestions? Yes, I wash the castings before painting.

Carlo

Design-HSB

Hi Carlo,

Resein Parts should be beamed sand beforehand, only that removes the Separating Agents completely.
Regards Helmut
the journey is the goal

Burl

I ran into a similar problem a few years ago, but with a different brand of paint.  The manufacturer had modified the formula, and it was no longer recommended as "plastic compatible".