Sometime you can effectively make use of a hand sander to remove some, not really all, of this varnish from the wood.
The start we usually start all of the regrouting process is geared to the existing grout color, since it truly is the rare circumstance where we will have to remove all of the grout. https://Socialrator.com/story10542421/the-right-cleaning-tools-make-your-job-easier