Daves right , The BC/CC needs the clear for the shine , and Protection !
Dont skimp to doing a job right .
Find out if the color you are using can be mixed in a single stage as it doesnt require clear.
Make sure you clean jambs real well with soap and water first , then wipe real good with wax and grease romover , and when you sand the jambs you sand them good , because anywhere you dont get sanded will peal in time and , makes for a crappy looking job when it all starts popping off.

Best way to do a color change is to blow the vehicle apart.

SprayTech