Advice for re-commissioning Coupe

Thinking of putting my 20VT [6] back on the road after 5 years of dry storage with occasional runs up and down the driveway.
Two main questions: anyone know any specialists in the West Yorkshire area who could change the belts, do a service etc.
Secondly: what’s involved in dealing with wheelarch and sills that are a bit rusty I.e. what sort of cost?
All advice greatly appreciated.