Hi guys,

I'm hoping somebody can help me with this ......................  >>


I'm currently making 2 headlight covers tooling plugs using EC' Vac-Cast Epoxy Resin.  I followed the entire procedure as per the instructions,  my first cast turned out superb,  my second cast ( image above ) ended up with hundreds of tiny little white specks on the surface!  

The white specks are on top of my tooling plug,  no white specks on the sides or bottom of the plug.  As the cast was done upside-down,  the top of the tooling plug would of been the bottom of my silicone mould.  I used the aerosol MANN 200 silicone release on both plugs,  so if the release agent would be at fault,  both plugs would of ended up the same,  but they didn't ..............  just this one.

You can't feel the white specks when running your fingers lightly on the surface,  but I'm a little concerned that they're going to cause problems on the next stage as I need to vacuum form transparent PETG or Polycarbonate to vacuum form the headlight covers.

Would anybody have any idea what caused this please?


Many thanks for your time.



TURK
T4 Concepts

Very strange that it is on one not the other.  Anything that could have got into the resin during mixing? or something falling lightly into the mould?  Assuming both pours came from same resin batch and it was well mixed etc then I can't think of anything in the resin as a contaminant - seems too small/light to have sunk through the resin.

Does it come off with light sanding or a a quick polish? It almost looks like tiny air bubbles on the surface that have filled with polish or sanding dust or similar.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant