Chatting to chum Chris Charlton and he mentioned an article in one of the magazines about using gel pens to paint detail on figures. I was skeptical but decided I would give it a go.
I ordered a silver, a gold and a white with plans to use these to highlight the metalics and do the hat tape for tricornes.
Its early days but so far I am quite impressed with the results.
The first figure below is a Swedish Seargent, I used the silver pen to touch the edges of his halberd after base painting it with a darker metallic, this is meant to give the impression of sharp edges to weapons.
Taken as a whole, highly recommended, if only for certain jobs. The colours in particular are spot on.
The pens I have used are Uni-ball Signo, I have no idea if other makes are as good. These ones were about £2.80 from ebay post free. Overall a worth while investment I think.