I've used silly putty before. It tends to creep into the smallest cracks and openings, and will stick if left on too long. Blue tac is much better.

Bill, great looking build. I'm amazed at the speed. I'm only halfway through the build portion of mine.

Jeremy you are most welcome. It was interesting to me to see them side-by-side as well especially given the fact that they represent a substantial gap of almost exactly 3 years in terms of technique evolution time for me. Winter whitewash schemes aren't ones that I tackle very often with this particular build being only the 4th one I've attempted in the 9 years I've been building armor.