I have one of those free stormcaster and a discounted set of 3 metallic sharpies, so let's try.
The only thing I conceded was a black undercoat and some touches of black where I slipped. 
First of all, the silver was dry out of the box. Now I know why the pack was on a discount.
The results are meh, but consider this: no glue, no paint (except the black undercoat), it took 20 minutes and it is tournament legal.
Food for thoughts.
