Sorry for my ignorance, but is this water based polyurethane that you are using? Polycrylic sounds more like acrylate or so ... There was a description of the use of water based polyurethane+glass in RCM quite a few years ago, and they used toilet paper to soak up the excess, and that is why I am assuming that you use water based polyurethane. Do you use straight lacquer to fill the weave, or do you add something to it?

Water based lacquer is supposed to be very light, as the water evaporates, so the weight of the water in the lacquer disappears.

Thanks for a very interesting thread!

Kris G