Just wanted to share this.
I had my TRD exhaust sitting in my garage for over a year and previously driven on it for 4 years. Never cleaned it and today I finally got the chance to since I will be re-installing it in my car.
Friends recommended the Mother’s polish to clean but I found something better and it only costs $3 at target or Home Depot.
It’s called, Bar Keeper Friend. I actually use this for pots and pans since that’s what it’s known for but since the exhaust is stainless steel, why not?
The tips came out pretty clean. Took 15 mins. Unfortunately no before photos but it was bad.