Recoil starter repair

Ok, I'm new here so please forgive the lack of total clarity. I have a Sachs MA50 engine goes on an 1072 Attex 2.4 project bike. the recoil starter appears to be functional, pull rope pulls and recoils back nicely, the spring loaded metallic catches that would press against the starter hub are for all intent and purposes worn out. Is it possible to spot weld (TIG) added metallic surface area to increase friction to rotate the hub or is this just my pipe dream?