Best results on SIlver with REjex from my experience come from using with a PC polisher. This product likes Seal Grey.
A little bit too much dried up bits for my liking and the gloss wasn't as high as others (I think you can notice it on Stryke's old Silver here).
Some products are better on certain colors.
Dark Colors look great with most high end products. Lighter colors like SIlver and White really need a higher gloss topper like S100 or P21s to get that extra sparkle. The FK1-#425 I just ordered is receiving claims of the highest gloss of a synth. on the market....we'll see about that!
and of course dark colors love toppers just as much as light ones.
s100 ($15)