Almost all the cars I've had even new I've kept with BC/CC the clear delaminates after a while. the '04 GTO I bought in '05 added the '05 style hood and was painted in Sikkens BC/CC and it delaminated almost the same rate as the original paint. Now my wife's dark green '02 Avalanche still is decent except just now some on the hood. Single stage is sure easier to touch up.
I disagree clear over color in single stage does not add depth, my 78 was done that way with Glasurit polyurethane and it definitely added depth to the shine. Done in '88 and still looks good-except from burnout chips
