The Wessex needed better camouflage because they were so slow.
Tough as old boots though – look at the hammering they could take, both in normal use and from unfriendly fire. Always thought the 1980s/early 90s scheme with prominent serials, letter codes, crest and 'Royal Air Force' marking (as ShyTorque noted, if for journos' benefit it didn't work) looked best -
as in this October 1992 view of XR498'X' on the 'old' concrete south spot – taken from beyond where Floppy-Link's cab was parked in # 475. Replen facilities look fairly basic at that time, (were the fuel bladders Chinooked in?) but at least TSW were there.