You read it right!
I'm proposing that electroplating (with silver, while were at it) might be a way to achieve excellent flatness on our dear blocks.
The silver won't improve the thermal properties of the block, since it's still copper.
From what I've read, silver can easily be electro-plated to copper, up to a thickness of 300 microns, or 0.3 mm, with a minimum of 0.5 microns (at least according to
this website.
From another site, it seems that in order to achieve a very smooth finish, a low current should be applied, but will take longer.
From
this site, it seems that all we need is a 12V battery (or a PSU, maybe?)
(I have yet to find a DIY guide)
Comments?