Hammer on weights are evil, the steel bit bites through the finish, and the lead bit eventually reacts with stainless
If the tyre monkey knows what he's doing it's possible to use inner stick-on, they can be placed inner outboard and inner inboard on the rim to give proper balance on a dynamic machine
Pressed steel, alloy and posh stainless are all doable, so don't be fobbed off
Another option are Dynabeads
https://www.dynabeads.co.uk/ self install in the comfort of your own garage
