I'm told that the industrial ones that usually have a 4" or so wide belt can get things surprisingly flat. Not sure how it would work out on the hobby come woodwork ones as the belt run is a lot shorter.
The Chinese have also been know to finish off certain lathe beds with a linisher of sorts – belts in other words rather than grinding wheels. They must be similar to the wood working ones for sizing very thin panels with some added complications. The machine I was told they used this on had a dovetail bed. Saddle fit to the bed wasn't it's problem. That aspect was fine.
John
–
Edited By Ajohnw on 02/12/2016 13:27:26