I took off the Intel Core i7 and the Nvidia sticker from my laptop. With the first sticker, which was much bigger, you couldn't see anything when I walked over it with a cloth. Now it is the case with the 2 smaller ones that no residues can be felt, but you can still see the outlines. So 2 little darker spots. Can you somehow make it go away?
The surface is made of aluminum.
A little rubbing alcohol with a cloth / rag will do that. After the alcohol, wipe off with a little water and soap.
Are the outlines superficial or have they colored into the aluminum?
So it doesn't feel any different to the rest of the aluminum surface
Take acetone or mineral spirits, you can reserve online and pick them up at hardware stores, it always works.