For component modifications, it says I can paint the minis, what about the bases? I want to dip the feet of the ship base in a rubber coating so they won't slide around my table, it is much cheaper than a play mat. Will this cause an issue according to the tournament rules?
Depending on how thick that rubber coating is, I'd say it can make a difference at the front "legs" because it makes inserting the tool more "flexible".
I wouldn't know what to say against dipping the back legs though, which should also give you some decent grip.
Alternately just do it and if they mind, peel it off right there. Shouldn't be too hard for rubber on plastic.