Thank you all for the suggestions but nope on the issues suggested. These are standard mylars (ACS 40 mil), triple waxed. Standard wet-out and layup, etc. No wrinkles in the mylars, cloth bunching, etc. There's nothing unusual about the setup. I've looked over Phil's video several times to see what I'm missing but it's the same setup and generally the same technique.
It really looks like it's small pockets of trapped volatiles that can't get out from under the upper mylar after the epoxy has started to kick. Has anyone had problems with volatiles in the wax? Since I only do this for myself, the mylars are usually used shortly after being waxed. The exception being when they're painted and then they are bagged after letting the paint dry for 24 hrs. Cores go in perfectly smooth but the upper surface comes out with a few of these little tracks/indentations in them. Thanks for the suggestions. The occurrence is somewhat random. I'll keep trying things to see what's up. - Dave R RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
