Someone said to use 1500
This will dig deep, I tried 2000 on a test scrape, forget it!
I have used standard auto type red compound, this is like 5000 grit,
Do not use it on shiny alum, it will scratch it.
But where you have patina or mild corrosion, it works wonders and fast.
First wash off any dirt just like you would was your car.
If you have clear coat in blotchy spots or on the lower half as many do just leave it for now. Compound the other areas.
Them strip the clear coat and Metalwax.
Let it drip dry.
Start up high not low
Smear the red compound in an area about 2' x 2'
Using a buffer with a 8 or 9" wool pad start at it.
All you want to do is get slight sheen with this, this is not for polishing.
You will get a lot of black swirls and it will look ugly.
Keep it damp if it gets dry, use a spray bottle.
Get some soapy water all the black will wash away with a stiff sponge.
You can leave it that, but I wouldn't.
I use a product called Metalwax.com next.
You can do a 30' in 30-35 hours.
No I will not use Nutravite, I have a life, I'm not spending 200 hours on polishing and look like a racoon.