Lovely job. You have captured the way the sand paint wore off to show the green paint below brilliantly.
If you are building more Op Telic vehicles and want to be super accurate, you may want to check your chevron references. From memory they were supposed to have the point to the rear. I think point to the top was Op Granby, but to be fair it was not unusual to see vehicles with them in all sorts of directions as they got slapped on at the last minute. Some of our old and bold put them on Granby style and had to change them. It was a quick change as we use black nasty.
Definitely a brilliant model and better than any of mine