skid marks from the rubber bases of cornies are a pita, if considering servicing/cleaning the keg in the bath, do so on a non slip bath mat or you will be scrubbing the tyre marks out for days.. my solution has been to do all things corny cleaning out on the patio, and sit the keg on a tray when filling,,
I had to google the product you used and tbh i dont know how long that would stand upto a full keg dropping a few inches onto a hard floor time n time again.
a rubber paint product or perhaps a silicone from a tube could be sculpted over if you have a need to keep floors pristine where kegs will sit for serving?