Originally Posted By: Brad_C
Originally Posted By: ironman_gq
JB weld might work, they also make a marine epoxy. Either should be much better than any type of body filler.
This is going to sound ludicrous, but my experience with JB Weld on Aluminium has not been great *unless* you take care to go through the oxide layer. I hit the ally with a stainless brush on a dremel and basically lay the JB weld on behind the brush. Before I started doing that I actually had several adhesion failures where the epoxy bonded to the oxide layer which eventually pulled/fractured off the metal leaving shiny aluminium.
Not ludicrous at all, things don't like to stick to the oxide layer including paint. That's the reason for the special primers made for painting aluminum, they etch the oxide layer and let the paint get a good bite.