I doubt that StewMac would ship naphtha to the UK anyway, they no longer ship flammable
For cleaning paint/lacquer I always use white spirit. For
ebony/rosewood fretboards and bridges I use lemon oil, it's largely a conditioner for the
wood but it does lift off general grime too. For maple fretboards (and VERY dirty
rosewood/ebony ones) I'll use lighter fluid, which is another name for naphtha. For
electric bridges I like to strip them down and soak them in a jar of WD40 overnight then
use a toothbrush/kitchen roll to clean them before lubricating with 3in1 Oil when I
So, if you want to try any of the naphtha techniques on the StewMac
site, a can of lighter fluid will do the job. But be careful with paint/lacquer finishes,
it is a solvent and can do a lot of damage if you aren't careful.
When the going gets weird, the Weird turn Pro.