Thanks for the help Phil, I've already painted the lower hull and waterline, but as you know white is a hell of a colour to get even with a brush. The actual shade is Schnellboot Weiss which when shown a paint chip and RAL colour translates as White Grey 70993 in the Model Color range and is an exact match!
As I've mostly got the hull painted I'll use a few coats of well watered down white grey and see what happens.
As for the easiness that the paint get scratched off, I've already noticed that when putting the hull onto the stand that comes with the model so I'm goin to try putting some soft felt onto the stand which should help against scratches.
I'm also considering an overall coat of the Vallejo Clear Satin Varnish on the hull which should also protect the paint as well.
Anyone else have any further thoughts???
James