if it is so deep it might have gotten to your core (ie thru the paint work) if your board has a wood core (some still do but not as many as in the old days) then it needs to be thoroughly dried out before repairing, otherwise the wood will rot and your board will die.
then, you need to p-tex it, (wax is just a polisher not a filler) either yourself or at your local board store (for a price)
if you wanna DIY, then pester
snowolf for a link to his excellent
you tube tutorials on such maintenance techniques.
as said above, clear / white p-tex is difficult to melt clean (ie without soot) but if you have black p-tex, or a black board base, or a scratch thru the base's paint, a dirty smudge won't matter too much now will it? besides chicks dig scars.....
