I have tried to do this on two seperate occasions and each time I have done it the paint looks great. The trouble is that after two months or so it all stars to bubble up look terrible. Can anyone help as I know this is possible and when done well looks the absolute t#ts.

 

The durability depends on your level of prep work..sanding, pre coats and final coats. MAXpower recently had a good article on doing it....

 

The most important thing after all the preperation is that before any sort of paint is applied you have to give it a coat of "PLASTICOAT". This is a clear spray that actually eats into the plastic and gives it a key for the primer which in turn gives a key for the paint.
If you do not use it you will always have the probs you are having.
Ralph.