Hello all! I just purchased an ‘05 ST with some pretty substantial yellowing on its exhaust. What do you recommend for removing it that won’t scratch the finish and is reasonably safe to work with? I’ve seen the Harpic toilet bowl cleaner videos where hydrochloric acid seems to be what works, but what’s your favorite “stateside” solution that won’t burn skin in the process? Just looking for something safer, yet effective. Thanks much!