Re: Exhaust stains
 

I used Sno-bowl toilet cleaner with great results, but it is an acid and will strip all the wax so be sure to wax afterward and remember to wear gloves.

Re: Exhaust stains
 

Lime-a-way works great for the tips. Use a tooth brush to apply it and rinse off. They look like new.

I use Simple green for the transom. Cut it 50% and put in a spray bottle that will give a really fine mist. Then soak the transom. It has to be applied evenly or you'll have white spots. Let it soak for 10min and wipe off. Works like a charm.

Re: Exhaust stains
 

"on off" By marykate is made to clean boat hulls it does great ,it should take the stain right out. You can find it at boat supply stores.

Re: Exhaust stains
 

I too have used snowbowl and it works good, Nasty acid though so watch your skin and eyes .