Don't know about Fasmask, but Jon Miller just released new liquid mask
http://www.rcsgraphicworx.co.uk/shop_liquidmask.htm
As he paints loads of shells (and they are artwork) I belive he has only top stuff.
To chrome as it was mentioned before - Spaz Stix and Alclad are paints to choose.
p.s. you can find Jon on this forum if you'll want.