in the process of bath room demo and remodel, job is almost completed and am
about to install a new toilet set

in looking at the floor connection where the waxring is seated and lower
section of toilet is attached, it is rather badly rusted.

is there something I may do before I attach the new toilet set, since the
drainline is now exposed and everything is clean and new? should I consider
patching the ring/waxseal area with something like royal jelly? use an epoxy
bond after sanding rust away? something else?