hey when i first started in the auto business my mentor and very good mechanic Friend who took me under his wing taught me how to stop rim leaks was to clean the rim with scotch brite disk and with your finger rub used motor oil into the bead of the tire just before you install it on the tire machine
the oil will soften the bead and it will seal it .
done this many times on cars with badly pitted rims that other shops said were junk and never !honest never had one come back !
I would not do this on a race car but street car i have been doing this for over 20 yrs . no problems yet .