Sanding and Abrasives
Will planing wood already finished with polyurethane be hard on carbide planer knives? I’ve heard the finish bakes onto the knives, eventually causing them to overheat.
A recent basement flood left a dark “waterline” on some walnut frames that were waiting to be finished. Is there a way to erase the blemish?
My drum sander starts out working well, but after I use it for even a short time, a burn streak appears in the sandpaper, and eventually the wood. How do I correct this?
In project articles, you often say “sand to 220 grit.” But how do I know which grits to use before 220?