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Originally Posted by Rick TYler
Arthur's advice is excellent. If you can repair the fin off the rocket, you might lay the fin on a piece of polyethelene plastic (the plastic sheets sold in rolls in home centers are mostly poly) create your repair with epoxy and fiberglass stiffener, squeegee out the excess epoxy, and the cover it with another layer of poly. Place a large flat weight on top of this sandwich and you will end up with a smooth, no-sanding-required surface.
Alternately, you can replace the poly with release fabric, which would "suck up" the excess epoxy in your laminate. Since you probably don't have any release fabric, you can just forget this part. 
Good luck. |
What kind of release fabrics are you talking about, because from what I have read I thought it was only used when it cures in a vacuum, or vacuum bag. Kinda like when they make huge carbon fiber parts.