How do i varnish wood? I bought a table for my fishtank and I need to varnish...

I bought a table for my fishtank and I need to varnish it. I enjoy no clue as to where to switch on, what can i varnish it with, what equipment will i requirement and how long will it take me?
Can anyone suggest where on earth I buy...
Answers:    If the wood is verbs and smooth it shouldn't need any preparation. If it's a bit grubby donate it a light sand with smooth sandpaper. All you wil necessitate to do next is settle on on what type of shading you like, choose a stainer varnish and paint it on beside a brush. Very easy! Give it a second coat when dry. Pop into a local diy shop and they will provide you a choice of stainer varnishes.
How do I best pocket in the order...
you varnish it near ...eh...varnish obviously