Thanks guys, for all suggestions and hints with my bubble problem. Also I received an email from the guy who is not on the KR-net list. He in fact knew that I am using wax for mold release and I have the feeling that he is more than right about my attempts in composite layout.
While his website is not KR related it is still worth to look at to learn about finishing of composite airplane. George geo...@hsweb.net Here is whole email I got from him: "I saw your post on kr list , I monitor the list on the web but do not subscribe because I don't want all the posts in my mail box To your problem with bubbles in spinner carbon lay up. My guess is you are using wax as mold release. Because wax repels resin the trapped air forms little bubbles right at the inner mold surface. Use PVA as mold release and you will have much better result , the technique of the lay up is important also, put in the first ply of carbon and use squeegee to push all air out and not just a brush, let the first ply cure enough that it will not get disturbed before adding the rest of the plies, then you don't have to vorry about it anymore . When using PVA you can also brush in a coat of resin first and let it cure then do the lay up. This is impossible to do on waxed surface because the resin will break up and fish eye. Btw, carbon does not work well on spinners, it is brittle and it tends to crack the way aluminum does. I would use carbon on the outside for the "look" but Kevlar on the inside plies. You can repost this to the mail list others might want to see it. My web http://curedcomposites.netfirms.com/index.html Good luck, George."
