I’ve done some digging in my photo files and the plot thickens with these Chullora carriers! Following series of photos posted by Cam Finlay on Facebook last year show brand new carriers in field parade in single colour KG3 circa early-mid 42 (judging by vehicle types present) followed by what appear to be camo field trials in mid-42 (wet, boggy, men in greatcoats) followed by carriers in 2-tone camo seen at Workshops in late ’42 (bright, sunny, men in shirts) followed by Sydney street parade showing carriers in identical 2-tone pattern to those pictured in Chullora Workshops photo dated 23 November 1943. I’ve also dug up AWM photos of these carriers in Sydney parade which date the event to 12 December 42.
I therefore believe the NSW Railways archive photo has the year wrong (not uncommon I find) and the “rectification” carried out was disruptive painting in Young’s scheme. Except for some reason the AT and Mortar carriers, on which the earlier pattern is seen and the colours are much closer in tone, looking very much like KG3 / Light Earth to me. Perhaps this was a matter of timing - recall Young ordered 8000 gallons of paint on July 8 but his MC319 Variation was approved in October and was adopted by 2 Aust Army around that time (G1862 dated 8 November) meaning these carriers had to wait until November to receive disruptive camo. Perhaps the AT and Mortar carriers were deemed more urgent and received the currently approved colours at the time.
I note that 8000 gallons will cover 8000 x 15cwt vehicles or 4000 x 3-ton vehicles, according to standard instructions, and that’s in the field with 4” brush, not the miserly thin spraycoat applied in production, which might be expected to double that coverage. Whatever the case it seems clear Young was dealing in production quantities, and he was certainly keen to promote his scheme.