Correction
H&R often run different colours because its a lot of work to constantly change colours in the powder coating booth for different spring types !! , The same paint plant is always used so if a certain colour is in the machine that is usually what they will use . over the last 5 years we have seen many changes in colour from red to black ,This isn't significant at all !!
The new springs were not replaced under warranty because the warranty only covers breakages and yours were not broken.
they were supplied to me as a good will gesture, which i past on to you .
I noted that you haven't returned the exchanged springs yet . H&R will want to investigate the cause of the corrosion and determine if its normal or caused by something else , My address is Unit 45 Rumerhill business estate , Rumerhill road Cannock WS11 0ET
Look forward to receiving them at your earliest convenience .