Hello Ive been having this idea that for donators they can have the command ./smelt this will smelt all ores in their inventory and this could be a small perk that will improve the value of donor ranks!
Another option would be to add the command /furnace which would act as a virtual furnace that could be use to smelt and would be portable! It would also improve the value of ranks!
Neither of these is very Overpowered either!