Do you Sand between base and clearcoat?

Need help understanding if you sand the color coat before you apple the clear? And at what point do you apply your decals. Iv hear you should apply a clear over the decal. Hope you can help me understand, thanks

Source: http://cs.scaleautomag.com/SCACS/forums/thread/984747.aspx

Michele Alboreto Jean Alesi Jaime Alguersuari Philippe Alliot Cliff Allison