Yes, Colin is 100% correct.
Humbrol Satin Grey No.127 is a very good match for post-WW2 RN warships. HMS Aveley in another thread on this forum is painted in that colour and she was of course of the same era as the Ton Class which likewise had wooden hulls, except HMS Wilton built later of GRP.
HMS Aveley''s grey is actually dry-brushed over the base colour with Grey No. 27 to highlight edges/wear etc plus the rear portion either side was usually part-covered with soot but i didn't have the nerve to do that. That is why some of these inshore craft had black hulls later in their service lives.
The only snag is you cannot buy large tins of the Humbrol colour but I buy mine in boxes of six direct from Humbrol (Hornby) so you receive them all of the same batch.
Paul.