Westlake Publishing Forums

General Category => Tips, Tricks, Techniques & Tools => Topic started by: Carlo on April 15, 2019, 12:42:12 PM

Title: Primer for resin parts.
Post by: Carlo on April 15, 2019, 12:42:12 PM
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
Title: Re: Primer for resin parts.
Post by: Design-HSB on April 15, 2019, 12:49:08 PM
Hi Carlo,

Resein Parts should be beamed sand beforehand, only that removes the Separating Agents completely.
Title: Re: Primer for resin parts.
Post by: Burl on April 18, 2019, 05:59:54 AM
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".