Why an ice blue acrylic? These things were base coated predominantly Panzer Gray or Africa Yellow. There were, of course, camouflaged varieties, but the base coats are still pretty standard.
The cover of the DML box shows a panzer gray (PG) gun, shield, base, outriggers, and transport assembly with a dusting of what appears to be white or light gray as a camouflage pattern.
My suggestion would be to paint the gun PG, then slowly add white to the PG to lighten it a little. Then spray the gun again, this time paying attention to all the surfaces where fading would occur first. Then mix a little more white and spray the areas where the fading would be maximized. Make sure you mottle the spray pattern to allow the under coat to show through. Then add your wash and dry brush using Tamiya Sand or even Radome Tan. The 88 in my sig was done that way except I used Africa Yellow as a starting point over a flat black "primer". The Marder in my sig started out PG with increased fading, and a drybrush of sand.
Hope this helps you some.
Gip Winecoff