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I have used Easy Off to stip paint off of old trim work many times. My5sons, I like the out side the box thinking. But I would not use that stuff on my atv.
 

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I probably wouldn't use it, either, unless I was restoring an old engine that was mud stained and looked real bad.
 

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I've used Mother's aluminum polish with a good old toothbrush with pretty good results, it's a tedious job though, especially on an air-cooled engine getting all those fins cleaned up again. I've never been able to make any look like new again, I'm no genius but I would imagine the constant heat cycles itself takes the new look out of an engine over time, with not to much you can do about it.
 

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The acid generally doesn't touch paint. I've used it on my dirtbike plenty of times and the paint on the frame is like new. I used aircraft paint stripper to get the red paint off. That stuff is wicked.
 

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I've used Mother's aluminum polish with a good old toothbrush with pretty good results, it's a tedious job though, especially on an air-cooled engine getting all those fins cleaned up again. I've never been able to make any look like new again, I'm no genius but I would imagine the constant heat cycles itself takes the new look out of an engine over time, with not to much you can do about it.
I would have to disagree. Here is my 2001 400ex after about 20-30 mins of acid cleaning. Fins cleaned like new.

 

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Looks great, dhsmustang!! Looks good as new.
 

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yea acid will do work on a engine my buddie just restored his grizzly 450 and that thing was a mess the engine was just about black. and it looks brand new with the new plastics and engine cleaned
 

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@dhsmustang, that bottom half does look good, but I'd have to say, have you thought about the chain?...it needs some attention, looking kind of sad back there! lol
 

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@dhsmustang, that bottom half does look good, but I'd have to say, have you thought about the chain?...it needs some attention, looking kind of sad back there! lol
I sold it not too long after these pictures were taken
Oh, good deal. That Engine was sparkling! :) My son tried to skip the chain clean and lube last time we went riding for 4 days. We came home and he washed it and tried to wheel it back into the trailer. I gave him a toothbrush and purple power to clean his chain. Then we waited for it to dry, and lubed it up. I told him if I see his chain dirty inside that trailer after we've washed it, I'll sell it and buy me something.

As for that AlumaBrite...that's about the only time I would try and use that stuff...if I was selling.
 

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@dhsmustang, that bottom half does look good, but I'd have to say, have you thought about the chain?...it needs some attention, looking kind of sad back there! lol
I sold it not too long after these pictures were taken
Oh, good deal. That Engine was sparkling! :) My son tried to skip the chain clean and lube last time we went riding for 4 days. We came home and he washed it and tried to wheel it back into the trailer. I gave him a toothbrush and purple power to clean his chain. Then we waited for it to dry, and lubed it up. I told him if I see his chain dirty inside that trailer after we've washed it, I'll sell it and buy me something.
The chain that was on my 400ex suffered through 4 days of torture on the Core Banks in North Carolina. That sea water will destroy anything and everything. Nothing could have saved that chain


As for that AlumaBrite...that's about the only time I would try and use that stuff...if I was selling.
why's that?
 

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As for that AlumaBrite...that's about the only time I would try and use that stuff...if I was selling.
why's that?
Well, because it has phosphoric and hydroflouric acid in it, it's toxic and will ruin other parts if it isn't applied properly, diluted properly and you can't really tell us what the "after" affects are of using it because you sold it. Purple power works well enough for me for now! :)
 

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Don't fix if it it ain't broke.

However, I have used ZepAlum on just about everything for quite some time now. Here is my YZ400F, I cleaned the motor after I got it about 3 years ago. This picture isn't very good and it is from last year but you can see it is still relatively clean, and no I'll effects of the acid to speak of.

 

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Do you live near the coast? Because there is a lot of rust on that baby. That chain looks like the cousin of your 400ex chain....lol I lived in Washington State, had a 67 Impala SS with no rust. Moved to South Florida - right outside Ft Lauderdale and the rust started showing up.
 

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Mine still looks pretty good, here's a pic before i did the full FMF exhaust, and I could never figure out why they painted the stock header pipe, when it turned out it was stainless underneath, just like the muffler.
Notice my rear brake caliper, how it has turned that dull looking aluminum color, I polished the engine, and you can see the difference, but it still looks nothing like when it was new, my brothers DR on the other hand is an 02 model, 3 years older than mine, and his engine still has that new shine, as well as the brake calipers. He lives in VA, and I live in the NE and I believe the weather has allot to do with it, you wanna see an engine shine, I wish I had a pic of his bike to share, and both bikes have always been heated garage kept, and covered.
I polished up the calipers after I took them off to replace the pads, but they never got that bright showroom clear coat look back to them, and not that dull aged look, but I'm not complaining, its a cream puff still.
 

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The bike sat on the trailer at the Core Banks, which did cause a lot of the steel to rust. I can't imagine living there. There was a Rubicon that was for sale not too far from the coast. When I was looking at it, I noticed that you could literally poke a hole in the frame with your finger! No thanks
 

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I have used an aluminum cleaner for tractor trailer, trailers for years with great success. It's a concentrate that comes in a gallon jug and makes 10 gallons by mixing with water 10:1. Cleans the engine like new, just don't let it set too long [begin to dry] or it stains a blackish color.
Just leave it on until it looks clean and rinse with water. Doesn't effect electrical part either.
Best of all, It's cheap.
It is found at big truck parts stores, and is called "Aluminum trailer cleaner"
There is also another version for stainless and polished alum. that isn't as caustic.
This is how those big truck trailers look so good.
 
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