Hey, you still haven't bought that bike dude?? Anyway,the rust problem is an inside the frame problem. It can only be addressed PRIOR to the bike's assembly,which doesn't apply to you,unless the shop does it,already has been done or your able to do it with only partial disassembly. JPWeigle Frame saver Boeshield T9,Linseed oil or Liquid Wrench or many,many other lube/petrolium distallate based products.It ought NOT to be a concern anyway.If you use the bike often enough and take it out once in a while during winter to sort of dry-out..as opposed to leaving it in a damp basement for months at a time to collect condensation inside the tubes it should be fine.Waxing the outside is ..whatever..??...