I didn't think it would be long - i started a thread about this ages ago but the guy looking at it for me lost interest!
http://www.oople.com/forums/showthread.php?t=3369
To be honest though Tel i can't see it ever over taking a good paint job, as they'll still be pretty much the same and i guess for 1/8th it's good purely as the fuel and stuff wrecks the shells whereas 1/10th shells should last a full season :-)