Al,
You have done a super job on this. Really fine painting, and a great credit to your skill.
As an addition, if it is possible, you might wish to add a bit of 6 0'clock shadow to the face. We didn't shave for two days prior to being inserted, and never shaved in the J - water was scarce. The cam creams we used were a black, a brown and a light green which we would streak our faces with to create a pattern. After a few days, however, it looked pretty much as you have rendered on the bust. It didn't take long before we looked a thoroughly grubby bunch, and stank to high heaven by the time we came out of the scrub.
Thank you for you kind words on the lads. Not unexpected in a few cases - we Vietnam codgers are now in the culling paddock, and cancer is taking its toll.
Cheers
Chris