when capping a fin box with glass, how many layers of cloth do you use? how much resin to mix up roughly? i am worried about the resin going through the cloth into the box, so do you tape it off during this step as well, then put the cloth over?
Scuff up a football shaped area around the box, mask the box as close to the slot as possible. Use about 30 ccs of sanding resin to lay a football shaped layer of 6 oz cloth over the box. Trim the cloth at the tape line with a single edge razor blade when it’s cured. Feather out the edges of the patch with sandpaper.
I’ve been told you can do a dry lamination right over the slot without taping and router the glass after cure but I haven’t tried it.
We did ours without taping off the slot in the box.
Just don’t pour tons of resin right over the slot! You are trying to saturate and stick all around the slot, so pour your resin there!
2 staggered layers of 4oz mo bettah…
Never had resin seep into the box, never needed to rout cured resin off…
Hi.
When placing a fin box and glassing it, I never tape the slot.
If you do it carefully, almost no resin will pour into the box.
When the resin gels, I cut the fiber 1mm from the edge of the slot and let the whole thing harden.
Once hard, I use a rasp / sanding paper and its clean.
If drops of resin are inside the box, just push them wuth a little flat screw driver as long as they are not super hard, they’ll go easily.
Sorry, it’s always hard to use the right technical words.
OK, that does it… I’m never taping over a box again.
Howzit?!? Maybe try this way- First, double-up a piece of waxed paper, bigger than the glass patches you’re going to use. Tape the waxed paper onto the board, in front of the finbox hole. Tape only the nose end of the paper. Place your cut pieces on the paper and wet them out. Tidy up the assembly with your squeegee. Grab the stack at the box end and drag the whole pile off of the waxed paper and right over the box. Clean up the area, and then hot coat when it’s off. You can cut out the hole after with a router or Dremel tool. Clean and easy. I had a lot of experience doing this in the sailboard days. Oh yeah, use waxed paper with p.e., use plastic bag material with epoxy. Aloha…RH
why borrow trouble?
tape off the aperture of the box with a single layer of masking tape. tape should cover the aperture, but not be so wide as to lay outside the box itself.
when the lam coat is gelled…same stage as when you’d cut the laps if you were glassing the top or bottom of the board…use the single edge blade to cut the tape loose and pull up.
follow up with a sanding coat. tape the aperture in the same place and when gelled…same stage as when you’d pull the tape if you were putting a sanding coat on top or bottom of a board…pull the tape.
Howzit Peter, Not neccessary to pull the tape after cutting it after the lamination. Just cut it and hot coat and recut it as the resin kicks and it will peel off fine.Aloha,Kokua