: The waves are likely from when it was folded. Folding can create
: semi-permanent wrinkles in the cloth that make it lift after being wet
: out. Actually it probably lifts before it is wet out but you don't notice
: it as much. Your idea of rolling the cloth onto a tube is a good one but
: may not have been sufficient. Also you need to be sure you don't introduce
: any wrinkles when you roll it on to the tube. One high point can propogate
: a wrinkle into subsequent wraps around the tube.

: When shipped a roll of cloth will often have a tag saying "DO NOT STAND
: ON END". If you stand a tube on end the cloth may settle towards the
: low end, this will also produce wrinkles and later waves in the lay up.
: They can be very persistent and hard to eliminate.

: Rolling out the glass 24 hours ahead of time can relax the wrinkles a bit,
: but this is often not enough. I have occasionally hung spring clamps along
: the perimeter of the glass to give enough tension to get rid of the
: wrinkles. But you need to recognize the problem while the epoxy is still
: wet.

: If you end up with waves after the epoxy is cured the best solution is to add
: several coats of epoxy to build up the low spots. You don't want to sand
: into the glass in the high spots to bring them down. Usually the waves
: really are not that high so it doesn't take as much resin as it may first
: appear.
I had the same thing happen to me. It only happened on one side of my hull. I epoxy coated my hull the night before applying the glass. The heat vent in my basement was blowing on one side of the hull while the epoxy cured. The next day that side of the hull was tack free. The other side that did not get as much heat was a little bit tacky. I thought it would be okay to glass the hull. The side that was tack free turned out good. The other side was a little tacky had fiberglass waves. I think when I was squeeging the epoxy out, the fiberglass stuck to the hull in spots causing it to wrinkle. I put extra coats of epoxy over the wrinkles and sanded it smooth without sanding through the fiberglass. Next time i will let the epoxy cure to a complete tack free surface.