I wasn't able to find another thread on this, maybe because it's a dumb question...
I'm hoping to sell my Nismo exhaust now that I've got the FI CBE exhaust installed; I noticed some of the people posting pics of theirs had cleaned them up nicely for their prospective buyers. Any tips on doing this once it's off the car? What product is safe to use? I'm assuming it's not that sensitive since it's getting soiled with road grime anyway. Also, do I need to plug the ends of, say, the H pipe or will it be fine if I don't spray directly inside?
TIA.