
I would always recommend using a golf bag with individual slots for each club with the liner being a soft material and not the plastic tubes. If they do get scratched and it does worry you just use T cut or similar because the outermost layer is just a paint finish.
As to regular cleaning I just wash mine in warm water with washing up liquid after about every third or fourth usage at same time as cleaning the grips and heads. Do not use hot water as it can loosen the ferrules.