Hi guys,

I have a question about coating the outside of an accords rear section exhaust pipe and rear muffler. I removed the external rust off of both parts (actually one piece). I assume that there is still rust on the outside seam area of the muffler, and my question concerns only coating the outside. I didn't want to paint it. My plan was to apply a can of instant cold galvanize. I have two cans of this stuff, CRC and LPS. Both are 95% Zinc. What I need to know is whether I can apply a "rust converter" to the external seams of the muffler, let it cure, and then apply the Zinc treatment over the outside of the muffler and pipe?

The rust converter contains Styrene Butadiene Copolymer Resin (latex). I assume you guys have used both of these products. As you know, a rust converter turns black and hardens up making it ready for painting. First, I am not sure about the compatibility of these two products, and second if there is a heat issue for either one?

Uh, I just talked with some automotive guys and they said there is no way the rear exhaust section of a Honda Accord will get to 787 F, [the melting point of zinc] even on a hot summer day. I'm going to put the zinc treatment on at least the seams area, and see how well it holds up. Perhaps I will paint the rest of it.

 

It might help some, but it will still rust from the inside out. That's where it starts anyway.