Are you talking about the bits of burnt on cloth that show up as a green or blue spot?
The 3 sided nail buffers that have something like 2400/4000/12000 grit sides work real well in combination with a magnifying glass and a clean,dry rag like a microfiber type. Under magnification,you can see they will have a grain to them like wood,polish in the same direction as the grain.
It might work on the little half-moon cracks too,but never tried it. Tommy D.
The 3 sided nail buffers that have something like 2400/4000/12000 grit sides work real well in combination with a magnifying glass and a clean,dry rag like a microfiber type. Under magnification,you can see they will have a grain to them like wood,polish in the same direction as the grain.
It might work on the little half-moon cracks too,but never tried it. Tommy D.