I remember when the Slingsby was taken on for the initial training, Hunting did the work and they were cleared to have the yellow black scheme added to the later new versions, however amongst them were two used earlier Aircraft G-HONG and G-KONG that came from believe it or not HongKong.
They 2 were painted in the Yellow Black scheme, however they returned to the paintshop soon after the error was noted to be returned to a White Scheme and for some reason the paint had not adhered correctly to the wing and I watched a painter peel off the entire Yellow top surface of a wing in one sheet. There was a fault wth the paint on the two in question and the Paint manufacturer picked up the tab I believe to have them repainted, but this time in white......... God knows how the likes of I think Jordan gets on with them in the heat as even the walkway paint had to be white.