Even floors that look perfectly normal can be hiding a finish that will melt and clog up sandpaper.
If your sandpaper clogged with hardwood floor finish, it isn’t a problem; it’s a solution! If this happens to you, drop to a coarser grit, which holds more melty finish and lasts longer, which will save you money.
Did you know that Pete’s stocks 12-grit and 16-grit for just this purpose?