Welcome to the Bunnings Workshop community @Ro. Many thanks for your question, I'd be glad to assist.
It's fantastic to have you join us and great to see you make your first post. There are hard coatings which offer an amount of protection to things like coffee tables. For workbenches that receive impacts and abrasions, these coatings will offer little to no protection. My advice would be to coat it with furniture oil to assist in preventing stains and nourishing the timber. Any dents or scratches that happen in the process of using the workbench will add character and be a testament to your handyperson prowess.
We look forward to seeing what projects you build with you new workbench and encourage you to let us know any time you need assistance or have something to share with the community.