I always use armrests on my guitars, because of the sound improvements. But they are made of ebony and black and -ugly. I tried to work on an JP armrest for my Adamas guitar to make it more or less invisible.

First step was to copy the rim of the guitar:

Then fill the cut with gold colour, the white line will be the last step

I found a good matching laquer for the edge:

Gold and red sparkles:

Colour test with "brown red":

Add red laquer and sparkles, little too much, was too shaky...

Add the white line

Add semi gloss spray varnish:

Final colour test, better than black.

And here´s the result:

If that's free-hand, I'd hate to see you do something more precise! I feel inferior enough as it is.

Really excellent work Detlef! Calendar-worthy, if I may say so....

And I imagine that the dampening effect you mention without an armrest is even more pronounced on a suspension mount system, so the effort is double worth it: You improved the sound of an Adamas (No small feat in itself!), and you had some fun in the process. It's the very definition of a win-win!

A fair distinction to make!