Dear friends, You are now making the same mistake as Malcolm Darch.
The thing is, Malcolm Darch for some reason thought that the ship needed to be returned to its homeland to be painted. Malcolm sincerely believes that HMS Agamemnon could not have been painted before 1893, and that is a mistake.
How it really was. Each ship had a supply of wood and paint in case of repairs. Ships in general need to be painted very often, and warships even more so. Something constantly needed to be painted, especially the sides after a storm.
The American War of Independence has begun. English ships are involved in bloody battles and are heavily damaged. But they are far from their naval bases and have no opportunity to receive repairs in the former colonies.
The ships' boatswains had an incredibly difficult task - not only to carry out repairs without shore assistance, but also to comply with the royal paintwork regulations. The friezes were the first to be damaged.
How to paint blue/red/yellow/green/black (these are the colors friezes were painted in according to the orders of the 1760s, not just blue) if you have a limited amount of paint?
And it is even more impossible to restore the beautiful drawings on the friezes at sea. Here, at least the mast should be repaired or the dead buried, no time for decorations!
However, changes in paint or destruction of decorations is an attack on Royal property, everything had to be restored as accurately as possible after the battle, and the boatswains had a very hard time.
That is why, after complaints from captains, the Admiralty, based on the results of battles, in 1780 allowed friezes to be painted over in plain black, regardless of what friezes were there before. It was also allowed not to restore the drawings.
Now, if a ship was damaged in battle, after repairs the boatswain could finally simply paint over everything that had been repaired in black (black and yellow are the main colors and the most abundant on board).
However, these are the rules of bureaucracy: "permitted" in 1780, but documented according to all the rules only in the nineties, "permitted to paint over in black, and to cancel the drawings altogether." And because the war with France began, and there was no time for paperwork.