roach25681
+1y
Yes you need to get off all the rust completely. Its just surface rust for now, so stop it before it goes any further. The reason you have to sand anything in a can completely off before a real paintjob is because there is nothing in a can worth a shit EXCEPT for a very small few things at the auto body supply stores. If you were to spray over it with rustoleum or even can primer from the parts store, then try to paint over that....it will never stick. It might last a day, might last two months. Either way you dont want that to happen. Since you have no compressor.......the only thing I can tell you to do is to try your hardest to find someone who does and will let you borrow it. Buy yourself a cheap gun and some epoxy and spray it. If there is no possible way at all you can do that, the last resort would be to go to the auto body supply store and they will have some self-etching primer in a can. But like I said, thats a last resort. Its a little better than anything from the parts store or Wal-Mart...but I still would NEVER trust it.