hi,
i do know that they did use the Grey scheme carried by other RNAS aircraft. I am unsure whether they used normal camo scheme at first..but my gut feeling would be no as they were modified at the factory so would have been repainted. they ahd 3 ( I beleive) converted test aircraft so tehy may have had the camo scheme or englands famous yellow protoype scheme. that might need a bit of research or some one else around here who knows more than me.
ny safe bet would go with the RNAS standard scheme of the time.
Hope this helps,
sean