Not meaning to offend you or anything ultrablue...but hamish i would not reccommend using any kind of waterless wash...especially on a black car! If you want something to take off overspray etc when detailing a clean car thats just been cleaned then it shouldnt hurt (i personally use Meguires final inspection)...but even after driving it around once i wouldnt touch it with anything before washing it again.
As for scratch X, be very carefull. Its usually pretty harmless BUT!-
DONT Use a dirty/already used (even for scratch X) polishing pad. (i know its probably pretty simple to work that one out..but for the first timers).
DONT Push really hard..it will cause a worse blemish than to begin with...and the point is that it will work the scratch out over time...so be patient when trying to get scratches out, pushing harder wont do anyhting because its not an abrasive forumla....its basically just a concentrated polish (from what i can tell)
DONT Bother trying to remove scratches that you can feel. Its only one that havnt bitten into your clearcoat that it will remove.
DONT Use too little. It will cause the polishing pad to come unlubricated.
I dont mean to scare you, becasue it is VERY effective and pretty harmless...these are just tips that iv picked up from using it over a couple of years on heaps of different cars.
Hope this helps
