sunshine
fill it.
TallPaul
Place a stainless steel pin in each hole and then grind both sides smooth.
STEVEN F
Short answer: Even TRYING will cost more than a new pan AND finish destroying the pan.
marcello
Duct tape
Karen L
You don't, at least not at home. You'd have to get someone to do stainless welding and chances are excellent that it would cost as much as a new pan.
My mother has a stainless frying pan that's 68 years old and still in working condition. I can't imagine how a stainless pan gets pinholes but it suggests that the pan is in really bad condition and more holes might appear soon even if you get the current ones fixed.