When looking in the more stylish furniture shops, they often have very large tables (e.g. 10cm thick x 1m wide x 2-3m long, made from one piece of lumber.
Understandably, such pieces often have come cracks, etc. In all the shops I went to, I have seen these filled with some black epoxy-like substance, and I liked the way it looked - I would like to use the same to fill cracks in my projects.
What materials can you recommend as wood filler that would give this look?