My grandpa said boil your first dub plate in a pot of water, and I laughed at him
So my grandpa ran a small radio station in Gary, Indiana back in the 70s and he swore the old guys would boil a fresh cut plate in a pot on the stove for a few minutes. I told him that was nonsense and would just warp the thing. Well, my first home cut on a plastic blank sounded rough, all hiss and crackle, so I finally gave his trick a shot on the second one. Dropped it in simmering water for about 3 minutes, dried it off, and the surface noise dropped a ton, way cleaner than the dry one. Maybe it softens the plastic or knocks off the cutting swarf, I honestly don't know the science. Has anyone else heard of this or tried it on their own cuts?
Tbh I'm not buying that this is a real trick people did. Three minutes in simmering water is way more than enough to soften a plastic blank and warp the grooves, especially the thin stuff they cut on now. Surface noise going down could just be your ears or the needle sitting different after you dried it. The old radio guys I knew would wipe a fresh cut with a soft cloth and a drop of dish soap, not dunk it in a pot.