Can anyone let me know when you should rout out the fin boxes during the process of glassing a board?
Do you set them after you lay down the glass on the bottom of the board or before?
Also, how do you glass the boxes in? i heard that you should cut out football shaped pieces of cloth to lay over the boxes once they're down, but how do you cut out the section of cloth that goes over the actual fin opening? do you just grind this away when you're sanding? Thanks for any help anyone can provide.
Lay your reinforcing patch down with your bottom lam then HC, then route out hole. Sink your box. Grind down your box lip until you get to your HC. If you want to cap your box, just lay down a patch over the whole box, and laminate it down with just enough resin to saturate, If you are careful not to force resin through the cloth, the cloth will hold the resin and none will drip down into your box, but will create enough of a “seal” to hold your final gloss coat and keep it from dripping through. Because the cap patch is not for strength as much as it is to seal the box and hole from water, you can fair the edge well and sand lightly. Baste the patch with sanding or gloss resin if needed, sand smooth, then gloss. When the gloss coat gells, trim out the opening with the corner of a razor blade.