Whenever I hear ‘cutting it out’ I shudder.
Figure this as a general rule for all ding repairs, with very few exceptions: don’t cut anything out.
The worst stuff I see as a ding repair guy ( professionally, if that means I get paid for it) is when somebody got a little cut-happy with a ding and started slicing and it turned into a nightmare. It is almost never necessary, it is rarely useful and it is always a lot more work.
So, here’s how to tackle this one.
First, make sure it’s completely dried out. Clean the wax off the area, sand the area lightly with 80 or 100 grit sandpaper. Get the dust off.
Depending on how much separation there is, you can either fill the depression with straight resin/cabosil mix ( using epoxy resin ) or carefully pry up the edge of the depressed glass with an x-acto knife or something similar ( scalpel, for instance) working the tip of the blade inwards so that everything’s even. You them fill underneath the glass with a cabosil-resin mixture. If you have an airbrush design or color you want to preserve, this is the better way to tackle it. Use masking tape and position of the board to help the resin mix get in there and gently depress the loostened glass to help get all the air bubbles out. Use a mostly-resin, little cabosil mix so it’ll flow well.
On a surftech or other epoxy board, you may be able to see some results without cutting in between cloth and foam or filling, depending on the foam used in that particular board. Use a hair dryer to warm the area, which can bring back the crunched foam. Use this method carefully, don’t overheat. If you don’t see some results pretty quickly, stop. If you do see results, several gentle warming cycles may be necessary. Then, deal with what remains with the method described above.
Okay, now you have a sort-of filled surface. Sand it so it’s even with the rest of the deck. That means either a power sander ( random orbit or orbital ) if you’re good with one or a block and some sandpaper and some patience. I wouldn’t use anything coarser than 60 grit with a sanding block, 80 grit with an orbital or random orbit sander. Sand out a little way ( about an inch) from your filled area. Clean off the dust, fill some more if you need to, sand again if you need to.
Now, glass over the area. Squeegee it fairly dry so sanding the edges won’t be that difficult. Sand the edges. Give it a combined hotcoat/gloss, laid on heavy enough to fill the weave, sand and polish that as you need to or don’t need to and you’re done.
hope that’s of use