Whenever I run into a problem like this, I take it to either the local aircraft welder
(there is almost always one at smaller airports) or the local stainless guy - who is a bike enthusiast.
They can usually advise how to proceed further.
It will require some considerable cleaning to be weldable.
But may just be possible without unlacing the wheel - if those fins are not structural.
A dab hand with a mig will probably do it in 3 or 4 short bursts, so as not to overheat things.
A quick google in your vicinity turns up these 2
https://www.rb-engineering.co.uk/welding-and-fabrication/https://cncfabworx.co.uk/services/mig-tig-arc-welding/As long as its not structural ...
Hopethishelps ?
