I was making a Mechanised Infantry unit and considering taking Cameleoline. The troops would obviously benefit from taking Cameleoline Cloaks, but would it be reasonable for the Chimeras to come equipped with either Cameleoline-coatings or to have Cameleoline Tarpaulins (from Deathwatch) to conceal them when they wish to set up ambushes? Armoured vehicles in the Imperial Guard are often camouflaged, and this would just be a greater effort on that part.
A similar effort could be taken to apply Cameleoline to Sentinels in Reconnaissance (or Heavy Recon) groups if it can remain in place. Cameleoline Tarpaulins for Artillery Regiments (especially Anti-Aircraft ones) might be of great use too.