heavyblinker
·Any attempt to clean the dial has risk that you will damage it further.
The “dots” are remainders of tiny chemical reactions between the dial base metal and moisture that made it inside the case and through cracks in the natural lacquer used to seal the paint on the dial.
It may be possible to have a watchmaker run a soft brush over the dial to remove any loose dust or dirt. Only you and your watchmaker can determine the appropriate treatment if any.
Hope this helps,
gatorcpa