How to remove Baked on exhaust grime?
 

I have new Gaffrig Stainless steel exhaust mufflers and the two Starboard ones have the black grime on them from the exhaust gasses. Unually this wipes right off with water or black streak remover. This time it seems to be thick and baked on. It is only on the top and in a smalller area. The rest washed right off. I can get it off with my fingernail but I dont want to use something abrasive. I remember someone talking about EZ-Off a while back. I am concerned about it discoloring or damaging the polished stainless.

Any tips on removal?

oven cleaner will work!!!!!!!

Try simple green

I will try the oven cleaner next.

I used simple green, It wont touch it. Workes fine on the "normal" Stuff and on the fiber glass but not the baked on on the Tips.

Lime-Away works like a charm. Just wipe on and rinse with water. Not really baked on, more like mineral deposits from evaporating water on hot pipes.

I'm not sure but it looks like black soot baked on. I tried the CLR stuff too it did not work either. It seems it is exhaust soot as it looks like the inside of the tail pipe.

Black Grime on stainless exhaust
 

Raypanic,
I have had pretty good luck usine Never Dull to get this stuff off, it takes a little elbow grease but does work.
Also chrome polish will cut the stuff but not as well as never dull.
Good Luck
Brian

I use the Works Tub and Shower. Spray it on, wait 30 seconds and spray it off. Sometimes I have to do it twice if it is baked on good.

You could also try laquer thinner.

CLR !!!!!!!! pour it on, wipe it off,,, no scrubbing !!!!!!! Also cleans the yellow stains off gel coat we get from running in the canal up here.

Try Shell Nautilus boat cleaner.Best thing I have seen yet for exhaust smeg removal.So good infact that I bought a case lot of the stuff:)

Try starbrite black streak remover. I think I had the same problem as you. I tried EVERYTHING and nothing worked. I happened to try some Black Streak remover, and to my surprise IT WORKED. I now keep that stuff in the boat as part of my cleaning arsenal!!!!
If it doesn't work, you'll have only blown $ 6.99. . . . . .

Bill, I use the black streak remover regularly, it works great on the regular soot, This stuff is the same soot but it seems to have benn baked on and the black streak remover will not touch it.

I need to try a few of the suggestions here (boat is at my shop). I will let you know what worked. The biggest problem is the tops of the mufflers are only about 1" from the bottom of my swim platform and I can't get any elbow grease on it :rolleyes: