to some usage:
Neither one of the sonic scrubs are used for stripping. You can use the
(703020) for a scrub & recoat. When using a general purpose cleaner along
with the 703020 you can take a couple layers off and then refinish.
sonic scrub (702420) would be better to use on larger tile. The
would be better on the smaller tile (1” squares) because the bristles are
thinner and will get into the grout lines better for you.
*Note: Neither the Red
or Green Sonic Scrub recommended
for Marble. Marble is too soft. Do not use on Marble.