I spent a bit more than that on one, we have a big old wooden table and chairs almost antique I'd say get the jet wash out and comes up like new i don't even bother covering it up no more, then the gutters if you have them can give them a good blasting twice a year, I like to keep the outside walls clean and on the top have you ever noticed Thais never paint the top usually it's black, I usually do the soi outside my house,