Cheers for the pics
I seal all the shells I paint with a layer of clear Plasticote - that said, what I also do on my own shells is run some tape along the sides and on any areas where the chassis may rub onto the shell. This makes them last MUCH longer before any paint gets rubbed etc. The tape I use is listed on ebay as 'Cricket Bat Tape'. It's white - a bit like Gaffa tape, but has a weave to it and is very tough. I then use velcro, stuck to the tape