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I bought a ash wood slab to be a nice table for our downstairs area. It has a few knot holes, one crevice, and one crack.

I've looked into the West System epoxy, and will dye it black and fill in the knot holes and the crevice with it. For the tiny knot holes, should I try to fill them with the epoxy? Like they are the size of a #2 pencil lead? For the crack, I have read to fill in a little of it first, then do the rest to prevent leaks. I have seen painters tap, plastic, to waxed glass. What works best? Should I plane down the board some more before I put in the epoxy, or does it not matter with a hand plane? Sorry for the numerous questions, every where I have read has done it different but never talks about how it turned out and it makes me nervous.

Lastly, I want to put a butterfly spline/joint? in the crack to keep it from moving. This is my first time dealing with ash, so I don't know what would complement it well? I mess around with maple, walnut and some purpleheart, so I'm looking to branch out a little more. Thanks in advance everyone.
 

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For the finish-
I would get the slab rough sanded / leveled maybe 100 grit. Then apply your epoxy - fill all the holes big and small that you want to be filled. Depending on the size of the crack you can do 2 or more pours to fill it. Make sure the last pour isn't very thick - this will help prevent air bubbles. With small pin holes you can work the epoxy in with a squeegee - when your done make sure that the epoxy sits slightly above the surface so you have something to sand. I use duct tape to keep it from running out the back, you do get some residue - but you have to prep for final finish anyway. Its cheap and I have it around the shop.

Once its all cured do your finish sanding prep work and topcoat however you choose.

As far as the butterfly goes I like anything dark to go with ash, but you are the one who has to look at it.

Good Luck!
 
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