From my early days as a militiaman attached to 8CH/RCD gagetown, we had only one M38A1Cdn2 as I recall for the COs rover. But Couger support squadron next door had a mixed bag of both M151s and M38A1s.
CARC did not come into play during the life of the M151A2 in Canada. Back then the paint was IRR (Infr red reflective) It came in 3 clours with NSN of 8110-21-880-9729, 9730 and 9750 (or was it 96XX? A bit of time has passed and the NSNs I committed to memory are starting to become hazy.). The three colours are olive green govt spec #503-321, Black govt spec 512-301, and green 503-319. There was a tan/white colour used on some of them in lieu of the olive on the earliest cam jobs, but by 1976 this colour was phased out near as I can tell.
For conversion of these colours to US specs, check out this webpage:
http://hedgehoghollow.com/buzz/Colou.../army_clr.html
There was a CARC introduced in the mid to late 80s in Canada, but while it did not contain lead, it turned out that the formula and the isocyanates were deadly. It was soon dropped and the US formulas for CARC were adopted. These are also quite hazardous to the health when sprayed, and also if any grinding or burning (welding) of the paint is done. That is why you will see the "CARC" letters on many items like cable reels or radio trays...as a warning about the health hazard of the paint. We were supposed to strip the paint with strippers before doing any welding on an area of a vehicle painted with CARC.
M151A2s were in use in CFE. I think I even have something around with the quantities that were over there.