Advice on tortoise table

[Shanie]

i have owned a horsfield tortoise now for 8 months we were wrongly advised by a pet store to get a vivarium. After learning that they are not good for tortoises we are looking at getting a tortoise table. Would this be suitable http://www.ebay.co.uk/itm/271918123516 ? We have dogs so must have one with a mesh lid.

I have read on a few websites that yacht varnish is a suitable thing to use to protect the wood from water. As our tortoise is a horsfield there isn't much moisture but i would like to make the table last for as long as possible. I just wanted someone to confirm for me that it is safe to use and that it works well.
If not do you have any other recommendations.
Thank you.