How would these do in a woodworking shop - with heavy machinery (on rolling bases)? My table saw is 800 lbs on a mobile base. Also, would these do well with glue or paint spills?

This would be a fine use for the tiles. Indentations typically do come out of flexible tiles as they are resilient, however heavy weight does have the potential to leave permanent indentations if the weight is focused enough. Flex tiles are stain resistant but not stainproof.