Have put some green oil paint along the waterline and was about to mark the position of the 2 boats and add some Gel between the boats and dock ( the area I would not be able to get after boats fitted) THEN LOOKED and thought what a clown.
Have not put any form of protection against the dock wall - so looked for old tyres but had none, so have decided to do what I have seen in some small ports in the north of the USA - wood beams hung from the top of the dock by rope.