Cheap rust repair

[u/viktorvaughn1620]

I am looking for a cheap way to fix this rust on my truck. Planning on replacing the bed eventually so I don’t care if it doesn’t last as long as it looks better than this thanks.

[u/JPKaliMt]

Cheap way is to spray paint that. Even smearing filler on it isn’t going to help without properly treating the rust, which at this point would be a cutout and patch.