I had xpel and just went for a fitter on their main site, not many listed.
Suntek is the other good brand.
shame werkstat has died a death as on silver/white that nano coat looks mega and it's spray on wipe off yourself. G-tech is expensive and you have to get a pro to do it really.
my werkstat kit was £40
white and silver never look good with a wax imo, this is my Spyder with werkstat on , you even get a reflection which is mega.
on silver I would give this kit a go, its said to be the same just about as werkstat and only £57 for every thing you need.
[link=http://www.polishedbliss.co.uk/acatalog/carlack-acrylic-kit-cat1.html]http://www.polishedbliss.co.uk/acatalog/carlack-acrylic-kit-cat1.html[/link]