I just thought of something. My dad said there is this stuff that he used on his turn sigs on his truck that got rid of the oxidation and made them look like new. I know that was used on plastic, but may be worth a shot. He said it's in a blue bottle and at the auto part store. I think blue was in the name or it was in a blue bottle. He there was only 2 brands there.

 

Soooo......your wife doesn't read the forums either does she?

My fins are still looking good, must be since I don't was it.

 

I always use S100 and it works great, haven't tried anything else.


Mike

 

Could everyone who responded with S100 please reread the origianl post. S100 WILL NOT clean the machined edge of the cooling fins! That is what the topic is about, not how to make your engine black agian.

Thanks!

 

I have try steel wool tonight!
It doesn't work, I think its only work out when oxidation not so serious!
But I will try another advised here...by a rasor blade, since the fin edge has some vertical line, the sanding will removed the texture, thats what happened to mine!!
scrape off might be the solution so far, I'll post the result here!

 

Yes! this topic is about the cooling fin edge!
Hope there is more solution can do so!

 

I have used Mother's mag polish on an old cotton tee shirt and it makes the fin edge look new again. You only need a trace amount on the tee shirt and work each fin. It is tedious, but works. Used this technique on my 03 fxd w/ silver engine.

 

Ok! but how was your engine's oxidation condition?
Mine fin edge goes some dark gray spots!

 

My fins were dull looking, no spots or such. Give it a try.

 

If the steel wool can't removed those dark spots, I don't think any polish can do the job!
one more thing, the sanding way make the fin edge don't look sharp!!!
Better don't try.