I have used that galv. stuff on welds on a fence and it will rust a lot faster than real galvanized steel. but it works ok and not like your quad will be out in the weather all the time
for great anti rust protection i recommend POR-15 paint.
expensive but i havent found another product that even comes close to it. it dries to a rock hard finish, easy to apply, and can be top coated if you wish.