Ah didn't look at the link... Thats alot of talk for not getting anywhere
That is fade plus minor oxidation, you'll need to lightly wet sand the area first with very fine sand paper. Then buff it with light compound.. Do not use the color restorer, you want a "compound" or "cutter". If you prefer 3m then get the oxidation remover, it has enough sand or "grit" to work after the wet sand.. You have a Finnish pad, you'll want the 3m bumpy foam pad. The reason is you need agitation to the area as well as the heat and grit.. The solid surface pad you have is a "Finnish" pad. Only use it with the finesse it 2... Then wax it with polymer...