We applied reflective aluminum tape to the inside of the nose bowls of our
Aztec to reflect heat away from the fiberglass. The nose bowls were covered
with oily residue. We found that aerosol Brake Parts Cleaner worked great
with no apparent degradation to the fiberglass. After we had them cleaned
up, the aluminum tape adhered wonderfully. Stand the cowling on it's end,
spray so the cleaner runs off, then wipe up any residue. What's left will
evaporate.

As for the holes and missing corners, you should be able to find a autobody
shop or fiberglass fabrication shop that is able to refurbish that area of
the cowl and drill new holes.

Jim