G'day mate, tend to agree with Woks on trying a lighter colour first up as additional light coats will gradually come out darker overall and it is easier to go darker and almost impossible to go back the other way.

In relation to the shielding paint I bought the 2 x 30ml bottle pack that came with an applicator brush from this eBay site... http://www.ebay.com.au/itm/GUITAR-SH...-IQjyx6fyzSF6Q

First bottle solidified 24 hours after opening and I had to add some water to get it back to paintable consistency. Still got to do 2 coats on both Explorers and reckon there was half a bottle left. Same with the 2nd bottle where it went more gooey for the 2nd coats and still half a bottle left that seems to have gone more solid than liquid. Job done on all axes so don't really need it any more.