Rust hole on the bottom of the tub

I got the washer from a friend so Im not sure how old it is. There is a hole on the outside bottom of the tub, about the size of a finger tip. Is there a “quick” fix till I can save to get a new washer? HELP!!!

They sell a tub repair kit P# 76673 about 1 1/2 inch diameter washer and bolt. If the hole is not too close to anything, this will work.