Polished aluminum trim coating

I have straitened, stripped and polisher the grill and trunk pieces. Most threads I have found polished the aluminum and coated with Mothers or some thing similar. Just looking for a coating to protect long term, brite dipping would be great, but expensive. Por15 and Eastwood offer products that are two part and the reviews are not good, loss of luster, yellowing and adhesion are the problems. Just searching for something I won't have to strip off because it failed.