Living in London, with Japanese paint......... In all honesty, I found the best solution was find a good resprayer and get the front end done once a year.... By the time you've shelled out a couple of hundred quid for Armour Fend or whatever equivelent, and something to go over the headlights, thats a couple of years worth of resprays nearly...... It's maybe not the easiest solution but, if done well will certainly look the best.