Cypress slab table HELP PLEASE

Hello all,thanks for all the great info here.Here's my problem.recently I found a table made of cypress.slab is about 4 inches thick and the stand is stumps.its about 25 years old and been neglected and unused for about 10 years.i cleaned all the dirt and grime of with Murphy's oil wood soap- huge improvement. Heres the issue,there are a few rings on top from glass bottles, and I'm unsure how to remove them. Do I have to sand the whole top? I was planning to finish the table with oil or wax and use on my lanai.Any advice would be greatly appreciated,thank you