I'm attempting to use knotty Alder for the first time. I'm making desks, window benches, and cabinets for my kids' rooms. The carcasses will all be painted, and made from ply. But, I'll be using the alder for the face frames, doors, and drawers.
Anyway, my question is, how to treat the knots. I picked out the best 80+ bd/ft, and still have quite a few knots to be filled. It will likely be painted. I thought of filling the knots with epoxy or some sort of heavy/hard filler. If I fill the knots first before planing, I'm worried that the epoxy would destroy my planer knives. But if I don't fill the knots first, will the planer cause a lot of chipout or break the knots?
Since the alder will likely by painted, would wood filler be just fine? Any other ideas? What about Bondo?