Sand until you get rid of the little wiggles. If you kiss the cloth, STOP!
Never sand into the fabric. You will need another finish coat to bury it.
A hard rubber block for the curves
Epoxy bottom hot coat.
It will never look this good again!
And of course, the ego shot
I faired out the first hot coat, to where it just kissed the fabric. Stop at that point.
Ok, so here's a part I haven't quite worked out yet, fin boxes.
Nylon really doesn't sand well. So when shaping down the fin boxes, it looks like crap.
I filled the slots with spackle to keep them clear, and laid down a patch of 4 oz. fiberglass
After that, the final sanding coat.
On the spectra I'm using, I cut out the boxes with an exacto knife straight out of the bag. Fill holes with plasticine so I can hot coat everything
Then Wet sanding with 400 grit as this eliminates any frizzing.
For boxes I put the glass on first to ensure a good bond to the core then spectra over top.
How are you sanding the fusion boxes flat with spectra?
I'm thinking the answer to the fuzzies is super glue, shave with a razor, and top coat
1. i cut out the part of the fusion box that will be exposed using an exacto knife prior to hot coating.
2. I fill the fin slots with plasticine to prevent epoxy getting into the box.
3. Hot coat (nothing special) .
4. WET sand. 220 or 400 grit depending on how good the hot coat was. I find with wet sanding, it creates next to no fraying as it doesn't pull on the fabric it just slide over it. Dry sanding when you touch the fabric you start to frizz The first board I did was a bit messy as I tried to sand through the spectra and did dry sanding at that.
I've got 4 copies coming up that are in the finishing stages and have come out very nicely after cutting first then hot coating then wet sanding
I just figured something out for the next board.
1) do cerex and cap layer at the same time, in the bag, but don't wrap the rails, just to the Apex of the rail
2. Cut in the fusion boxes after lamination.
3. In one step, do a rail strip, and fin box cover in fiberglass, so it can be sanded.
Stay tuned next month for the next board!
Also, throw away brushes suck. A soft bristled nylox. Cleaned first with vinegar, then xylene then acetone. Use a comb to clean between the bristles.
Finally I learned the trick to sanding epoxy.
Cure it first!
Fresh epoxy sands like crap, and gums up paper. I don't have a hot box, but I do have a furniture blanket and sunlight.