I never get good results when I just spot-coat exposed weave and try to sand it down. I always just expose more weave in other places. I call it "chasing weave". So in your situation I'd say you have 2 choices:
1. Do another "gloss coat" over the whole board as some are suggesting. (Gloss resin if it's poly; epoxy resin if it's epoxy. You can use about 30% less resin for this final coat versus your initial "hot" or "filler" coat. IE, if you used 9oz for your hot coat, use 6 oz for your gloss coat.
2. To save weight, just touch up the weave with some matte-finish Rustoleum 2x rattle can clear. That will make the white-weave become clear and seal it. When it is dry buff the Rusto. with some maroon scotch brite. THEN do 2 coats of Behr Acrylic Sealer (low-luster) wiped on with a sponge. Finally buff out that acrylic sealer with your maroon scotch brite, then grey scotch brite if you are feeling saucy. The maroon=320 grit equivalent and the gray=400-600 ish.
Option 2 sounds better. Why do i have to use acrylic sealer after using clear matte finish? Can I do away with just clear matte finish or just acrylic sealer? I have never used them before so I don't really know how they work. Thanks.
Milan, I only use the Rustoleum 2x to spot-seal the exposed weave. It turns the ugly white weave clear. I use the acrylic sealer (get it at home depot) to coat the ENTIRE BOARD so I have a uniform clean final surface. Do a search on here regarding the use of the Behr Sealer. It is the "secret sauce" of many pro glass shops, so they say...
interesting i have never heard to spot seal with the rustoleum first. I have found the behr covers up and makes the weave go clear, but have also noticed that after a few sessions you start to see the weave again as the behr seams to come off pretty fast. Does the rustoleum spot coat prevent this?
In my experience the Behr will seal (it is after all, a sealer) but it's so thin that it won't fill any weave. The Rustoleum "2X" is pretty thick so it does a better job filling the weave than the Behr. Not as good as another gloss coat, but it definitely makes the weave clear and fills it if it's minor burn-through. I am still waiting for someone to come up with a miracle sealer that seals and fills exposed weave. More viscous than the Behr but less viscous than gloss resin. A small fortune could be made on this. Emphasis on the word "small".
When you exsposed weave there is always a chance those exsposed areas may seep water if not properly sealed. When you see a board with lots of brown spots on it after a year or so; that is the reason.
What I use.
Thanks for the advise. I finally managed to find the Rustoleum and used it on my board, amazing stuff. I was unable to find the Behr acrylic sealer. I am living in Singapore and I read that Behr products are only sold by Home depot in US.
Yes, Behr is a Home Depot exclusive Brand. Not sure what equivalent there is in Singapore. It is an acrylic sealer for concrete and pavers. Milky white liquid, drys clear. I'm sure you can find something similar.