OK... Since today is a sit on my heating pad and eat Tramadol day, I did a little test.
I tried to take some pics, but found that the results really weren't reflected (pun intended) in the final pictures.
I used two of my favorite weapons of choice, Simichrome and Collunite 840 and compared them to the White Diamond polish on an oxidized aluminum threshold. I did these tests on two seperate areas, one area was stained heavily and the other just oxidized.
First test.. I applied WD to a small section. Smelled nice. That's a plus. Following the directions, it seemed to go on nicely and after waiting the recommended minute, it wiped off easily. The area was better, but not finished. It removed most of the oxidation and polished the surface.
I next applied Simichrome. It was a little more effort, but the results were a little better than the WD. It also did a smaller area. It polished the surface well, but I felt that it took more work to remove the oxidation.
Collunite 840 did its usual thing... No real polishing, but the oxidation was removed. I've been using a combo of Simichrome and 840 with decent success.
Second test. Re-applied the WD on the same spot. The results were much better and I would call that oxidized area done and the heavily stained area about as good as I'm going to get by hand.
A second application of Simichrome gave slightly better results than the first. Again the area was smaller but the WD area was better.
I didn't bother with a second application of the Collinite.
So... End results.... First, I've managed to over analyze polishing some thresholds and bored the heck out of everybody... Nothing new.
The White Diamond won out. Not as much effort for a larger area with better results. That's a winner for me.
It is not a "wipe on/wipe off" product. It does require some elbow grease, but I'm going to keep going with it. It also makes a real mess of the micro fiber towel I used to apply it. Turned the area pitch black. Simichrome does the same, but not quite as bad. I may have to look at applying it with something cheaper and more disposable.