I have a small balcony on which air conditioning units are placed. My wife would like me to build a table over the air units, where she can grow flowers, herbs and veggies.
Using what I have available, I'll build a frame out of solid wood and metal legs. On top of that, I plan to put a piece of plywood. This plywood will be exposed to tropical rain storms and equatorial sun (I live in Thailand) and will thus be taking quite a beating.
What would you recommend as the right way of protecting this wood?
In reading on the web, I've learned that I need to apply a wood stain and then a finish. Going through the different options, spar varnish seems to be the most sensible choice. But I'm not sure about this and would appreciate opinions.