ORIGINAL: Ed Smith
I do not use PVA on the plug I just cannot seem to maintain the high gloss finish for the mold. I use PVA for the first layup in the mold. I can always fix the finish on the first part.
As I said before I never use Polyester. I use only epoxy resin. PVA and quality release waxes are not affected by different resins. So far for me anyway.
The picture shows what I meant for the wheel hole. Just a small part is shown I think you will get the idea. The parting board can bridge the hole. It just saves having to fill the hole. If the hole is filled that surface has to be decent to allow a good release.
Ed S
P.S. Keep asking questions. You will save yourself a lot of heartache.
Ed,
Thanks for the photo, but sorry I'm having a brain fart and still can't figure out how the parting board goes. Here's what I decided to do. I put clear packing tape over the wheel opening. I then cut out my first ever parting board and added some wood to build a box-like structure. I use some plywood, but realized after I cut it, that using it was a mistake. It would not give me a nice smooth surface without a fair amount of work to close the grain and make it nice and smooth. So I cut out my second one from white laminated shelf board. Melamine I believe it's called. I then epoxied some pink foam to support the pant. My Dremel mighty-mite made short of the foam. As it turns out it workes a little too good. I needed to build up some more supprt, but some tape and thin balsa had me back to where I needed to be. I think I found a local source for Formula Five, and if so, I'll pick up some this weekend. Until then, looks like I'm on hold.
-Jorden