Painting PVC

I have sanded, baked, and urethaned a piece of PVC pipe.  I would now 
like to improve the appearance of the pipe, as it will not be covered in 
wire as my other form is.  I would like to paint it, but don't know what 
paint would be best.  I have a can of spray KRYLON paint I'd like to use, 
but I'm afraid to use it as I don't know whether it will lower the 
insulating properties of the pipe.  Anybody have a suggestion?