How to polish aluminum trim article

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1971 Boss 351
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Taken from article (with pictures) http://goo.gl/VtQgS

If you have a car made in the late 60’s, 70’s, 80’s or even the early 90’s, there is a good chance that your vehicle has aluminum trim. It can be found around the windshield, the wheel arches, back window and, in some cases, it was used as body side molding.

And, if your car is like most and lived part or all its life outside, the aluminum trim has become dull and has a multitude of water spots. No amount of wax or soap will eliminate the problem. The only way to bring the aluminum trim back to life is by polishing the metal with a good quality metal polish. You will also need to bring a little elbow grease but, trust me, the results are worth it.

The easiest way to get the best possible finish is to remove the trim from the vehicle and polish it at the work bench. It’s much easier to polish the entire part if you can just flip it around by hand. If removal is not possible or practical, mask the painted areas surrounding the trim as the metal polish can damage the paint. Otherwise, the process is the same.

You will need plenty of terry cloth rags. Old towels and washcloths work nicely. You will also need a good quality metal polish, rubber gloves, a bench top or drill mounted polishing wheel and .000 steel wool. You can get the .000 steel wool at most any parts house or home improvement store.

(Please note that you may not need the .000 steel wool. Test it on the back side of the trim. If you any scratches after rubbing the steel wool on the trim, do not use it.)

First, apply a small amount of the polish to the metal. Make sure you have a rubber glove on as this stuff will leave a black stain on your hand that has the half-life of a cheap tattoo. Spread the polish out and, using either a terry cloth towel or the steel wool, begin polishing the metal. If you notice a “grain” or pattern in the metal finish, always go in the direction of the grain.

Once you have rubbed out the metal and the polish seems to have run out, buff the metal out more using the buffing wheel. I used a drill mounted one in these pictures. A bench top unit will yield the same results with a little less effort. Continue buffing the metal until you get a good clean reflection on the surface.

One thing to remember is to use a very small amount of polish. The good stuff is expensive but it goes a long way.

Here’s one final touch that I’ll clue you in on. If you really want the trim to pop out at you when you put it back on the vehicle, wipe it down with dry Corn Starch. Yes, just regular corn starch you can get at any grocery store. The corn starch will act as a VERY fine abrasive which will remove any residual polish and slick the finish up a bit more. It really does work and it won’t harm the metal.

 
I've polished stainless trim, got it nice and shiny. It doesn't seem to last too long. It's dull in a season or two. What did I do wrong?

 
I've polished stainless trim, got it nice and shiny. It doesn't seem to last too long. It's dull in a season or two. What did I do wrong?
They make a clear sealer that you can spray on it for wheels and aluminum trim. You can get it at your local auto parts store

 
There is bare alum trim then there is anodized alum trim like our cars have

 
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Do not attempt to polish the trim on our cars unless it is the windshield trim on the convertibles

Our 71-73 use bright dipped aluminum trim. Bright dip is a clear plastic coating it is almost like a PC coating.

Over time the bright dip thins wears off or peels off and the aluminum trim is exposed.

Aluminum oxidizes very fast without protection from the air. So if you strip the bright dip and polish the aluminum it will look awesome for 2 days then turn black, chalky, white and dull almost instantly.

Stainless steel trim is a completely different animal.

You can have bright dip trim reworked, it is basically body worked to get defects out then polished then re coated with bright dip and returned for install.

The clear coat paint used on rims doesn't work either I tried it. I made the mistake of starting to polish my trim before I learned the sad truth, you can't unless it is recoat end after.

 
Do not attempt to polish the trim on our cars unless it is the windshield trim on the convertibles

Our 71-73 use bright dipped aluminum trim. Bright dip is a clear plastic coating it is almost like a PC coating.

Over time the bright dip thins wears off or peels off and the aluminum trim is exposed.

Aluminum oxidizes very fast without protection from the air. So if you strip the bright dip and polish the aluminum it will look awesome for 2 days then turn black, chalky, white and dull almost instantly.

Stainless steel trim is a completely different animal.

You can have bright dip trim reworked, it is basically body worked to get defects out then polished then re coated with bright dip and returned for install.

The clear coat paint used on rims doesn't work either I tried it. I made the mistake of starting to polish my trim before I learned the sad truth, you can't unless it is recoat end after.
Bright dip won't work either if it's not prepped right. you have to remove all polish residue with a wax and grease remover and completely cover entire piece...not just outer surface

 
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