Quoted from Darcy:These are more suggestions and this could be expanded to 8 or 10 grades. |There could be no end to this, still have to come up with some ranking for the playfield, and functioning game.
1-10 makes more sense, since many of us already rate them that way to our own standards. You are forgetting several other common flaws. Sun fade-this is a big one on some titles (reds/orange, etc.) and for Gottlieb-tape/felt cushion marks. Also, lifting is not the same as flaking, though still a common defect.