I used the interior paint that LMC sells which is Colorbond brand. They have a proprietary mix for the blue that my interior is. Parchment may be a bit easier to find alternatives. I used the Colorbond cleaner and adhesion promoter before the color coats. It seems to be durable and they do have a clear that can be applied after, however I did not use it. One of these panels was the original blue and one was white. No primers were used so you can see that the coverage over two base colors was decent. I like the product, time will tell on durability.
