All serving boards and anything intended for food service is finished with a food safe mineral oil and a food safe wax. To ensure your thing made from wood stays beautiful and safe, please give a wipe with the same (i.e. food safe mineral oils/waxes). None of my products are dishwasher safe. Wash with warm soapy water.
For tables and coasters etc, just use furniture polish as a regular cleaner and where relevant, an annual wax would help maintain the wood
Please do not store in direct sunlight or keep in exceptionally hot rooms (eg sunrooms/glass conservatories).
My boards are meant to be serving boards rather than chopping boards. All wood will mark, as will resin, and if you've bought something because it looks nice you may want to avoid carving the Sunday joint on it.