We've removed old ceramic tiles that cover a tongue and groove bathroom floor. What is a good way to remove the hard tile grout that now covers the floor?
EDIT: updated title as we've found Rimu is a podocarp softwood
EDIT: To answer the comment below, yes we would like to finish the boards with polyurethane varnish in keeping with other parts of the house
EDIT: after trying a bunch of approaches what worked was using a belt sander with P80 belts, stubborn areas required a little more pressure