paul
yes
andrew
ps - where the wheels fell off may not be where you thought it was
Yes the second coat was too thick/heavy, and Yes the answer is lots of wet and dry with a little detergent in lots of water - But try and get the hull VERY welll cured before sanding - put it in a warm place for a couple of nights, if you can.
The second coat to cure hairiness may not have been necessary - sometimes wet and dry at this stage will smooth the surface - leaving it looking very manky.
If you want to add a final coat of resin (presumably polyester - the smelly one) then you can mix in thixotropic additives (powdered silica) to reduce slumping and running.
You can also thin this coat and paint it on really thin so it is just a layer to hold in the raggy glass strands.
Good luck with the elbow grease - please send us pictures, and don't worry - everyone hates Fibreglass at some time!
andrew