Is the 6 in. x 12 ft. Royal Brown Aluminum Smooth Fascia Trim paintable?

Yes, it can be painted. 

Yes, the 6 in. x 12 ft. Royal Brown Aluminum Smooth Fascia Trim can be painted. The product needs to be cleaned with a cleaner that will not leave a residue (TSP soap works). Then a quality latex enamel paint should be used. Priming is not necessary.