Mask off any non metal areas around the scratched aluminum using tape.
Remove scratches from aluminum sheet.
More than likely to remove the scratches you are going to have to cut through the top layer and remove the anodize in the area with the scratches to blend them in with the surrounding area.
Of course with time and usage almost any aluminum from car rims to household appliances becomes scratched and dulled.
Not familiar with with that polish but it probably has some coarser abrasives to help cut the surface of the aluminum.
Unfortunately if your aluminum laptop has deep scratches and you couldn t find anything for scratch removing then go to amazon and buy rolite metal polish.
For example if you want to polish scuffs out of something like an aluminum stove or fridge you might.
Use strips of blue painter s tape or masking tape.
It can be used as a macbook scratch remover as it is basically made for metals like aluminum bronze copper chrome brass and stainless steel etc.
Fortunately you can remove scratches from many types of metal including brass and stainless steel with some serious elbow grease and the appropriate type of metal polish.
Cover up any sensitive or delicate parts of the aluminum object that you don t want to accidentally scratch or get polishing compound on during the polishing process.
Polishing cutting aluminum to remove scratches i m working on a couple of aluminum pieces which i ve used the cross sanding technique from 320 grit it was pretty deeply marred up to 2000 grit wet sanding.