I think you bought those sill plates from Craig. I saw them at his place before you bought them. I have a shop in TO, and will be out there on Sat. prepping a car for a race the following weekend. If you stop by with the sills, I will put the buffing wheel on them for a minute to bring them back up to a shine. I usually use Mothers polishing compound on aluminum after initial polish to maintain the shine. I agree with the clear coat finish, and have even gone so far to clear powder coat polished metals, but that was on magnesium which goes dull even faster than aluminum.
PS, this is my personal shop, and am not looking to get paid for work.
818 560 0534