Magnet Maker Posted March 11, 2009 Report Share Posted March 11, 2009 I have recently started molding baits using Smooth Cast 300 and 320. Both products have produced baits with pin holes which are so small that paint or primer will not fill the holes. Any suggestions on how to eliminate the pin holes and what is the preferred primer for molded baits? Quote Link to comment Share on other sites More sharing options...
MR KNOW IT ALL KIND OF Posted March 12, 2009 Report Share Posted March 12, 2009 Bondo glazing putty! You can buy it at a automotive supply store. After you sand 30 or 40 lures.. I promise if you ever sell them.. you will want 100 bucks for ever one you make! Quote Link to comment Share on other sites More sharing options...
WannabeeFishing Posted March 12, 2009 Report Share Posted March 12, 2009 Thanks for the heads up. I just received my first Smooth-on order. I also got an order of Featherlite. I'll post if I have the same issue. Gary Quote Link to comment Share on other sites More sharing options...
fishcrazy Posted March 12, 2009 Report Share Posted March 12, 2009 Smooth cast is very moisture sensitive and causes small pinholes from this reaction. Always spray the container with extend it which removes oxygen from the container before closing and I use it to get rid of the bubbles from mixing by spraying the top of the mixing container before pouring into the mold. Hope this helps. Mike Quote Link to comment Share on other sites More sharing options...
RiverMan Posted March 12, 2009 Report Share Posted March 12, 2009 Are you sure the pin holes aren't in your mold? Quote Link to comment Share on other sites More sharing options...
Magnet Maker Posted March 12, 2009 Author Report Share Posted March 12, 2009 Riverman, "Are you sure the pin holes aren't in your mold?" Yes they vary in location from part to part. Quote Link to comment Share on other sites More sharing options...
redg8r Posted March 12, 2009 Report Share Posted March 12, 2009 If your casting in silicone molds, try spraying the mold cavities with oil base primer before casting. Quote Link to comment Share on other sites More sharing options...
