Made a wee 2 seater Garden Bench a couple of weeks ago, 50mm x 25mm rectangular box section, and decking boards at £2.50 each from B & Q. The steel got 4 coats of Lidl's 'Deco Style metal paint' as recommended on here, and the wood got 4 coats of sage fence treatment ! Nowt fancy, but it does the trick, made a planter with the decking board off-cuts too, the planter is right handy for sitting my beer can on :-) Please excuse the state of my 70 year old wooden garage (seriously) ......like the bench, it does the job :-)