Using Formula 27 for the cosmetic repairs (thanks Matt B for that tip), it is poly based and very easy to shape and sand.

Now that the weather is warm enough for repairs (and warm enough to sail too <img src="http://www.catsailor.com/forums/images/graemlins/frown.gif" alt="" />) I've experienced a very, very, short window of working time with this product. I've reduced the hardener significantly and see not much difference in set up time (and when it starts to go hard it's gone in a flash) and I'm wasting a lot of product.

Has any one tried mixing in a plastic cup and setting that in ice? Looking for, or will try any suggestions. I has to be better than what I'm doing.