live wood slab finishing problems
First post and i'm looking for some help/advice on finishing a live sycamore slab coffee table, i am very new to woodworking and would love some experienced help. I purchased the slab which was dried and planed and i have sanded down to 220 grade, i started to see small cracks appear when i have been sanding - see attached - i was trying to even out the color as there are some darker area's. Am i sanding too much? am i damaging the wood, is this just a feature of the piece of wood?.... i stopped and applied a thin coat of Osmo clear satin. Some very defined areas come out a lot darker than others - is this just a feature of the wood? again images attached.
Any advice would be very welcome,
Thanks so much,