Originally Posted by MustRib
that sounds interesting...
can you give us a little more detail on how you did that?
does it not pull out the repair...etc..?
No, leave it on until the repair is hard. I should have said use the original easy tear sellotape. It's not waterproof and any bits still stuck can be washed off. Masking tape, as suggested above, may be better, but transparent tape allows you to see any bubbles or voids etc. and you can sometimes push excess filler into them. I might add that I'm no expert, though I have built several GRP boats in the distant past.