I am quite a beginner as far as diy is concerned and I'm in the process of refurbishing the old wooden stairs in our new house. Never done that before. It was carpeted so I removed it and there were several layers of paint underneath, and I removed that too, now I am sanding the treads.
The next step would be to stain the treads with a dark colour (to contrast with our flooring which is a clearer colour).
My issue is that being old stairs they have black "dots" and sanding does not seem to remove them, they are not superficial, they have a bit of depth to them, see pictures:
I'd like to know if it is OK to leave them as they are, given that we want to stain with a dark colour. Or is it bad practice and they have to somehow be "cleaned", if so, how?
On an aesthetic view, would leaving them look nice and authentic/rustic, or would it look like amateurish work?
I think I will need to use a stainable filler to mask the nail holes, will the filler be good enough to mask these black "dots" too?