Jim C, Crashtech and others are on here are true professional painters. Follow their advice and you will have no issues as long as you apply the products correctly.
The steps outlined are simple:
1. After your panels are properly prepped, shoot SPI black base coat. (It mixes 1:1 with SPI Reducer and does not require hardener or activator)
2. Allow ample time for the black base coat to cure before applying tape or stencils.
3. Apply your colored paints. (These should also be base coat paints that mix with Reducer and do not require activator or hardener)
4. If multiple applications of colored paints are required make sure the previously applied color has plenty of time to cure.
5. Once your colors are all applied and you are happy with them, they must be allowed to cure the required amount of time, before you apply your clear coat. (Clear coat will require an activator and some reducer.) Personally, I would recommend a Slow Activator and Slow Reducer to give your clear coat a bit more time to flow out and lay down. Less chance of orange peel that way.
Again, the key to success will be the proper application of the products. This will require an air compressor with enough CFM output to handle your spray gun's requirements, a good air filtration system, proper spray gun adjustment, consistent distance to panel, speed and overlap. Add to that a decent airflow through the both to keep any overspray from settling on the panel.
Pros, please correct my outline if needed.