Hardwood furniture isn't cheap. To keep it looking its best you need to use an oil or a stain. An Oil gives the wood a lightly tinted finish but you'll need to put it on a couple of times a year. A stain gives richer colour that'll protect year after year, after year.
Looking to add colour to your garden furniture. This is perfect
Basic garden furniture protection
Nourish and protect your garden furniture
5 x faster garden furniture protection
Nourishes your hardwood with a touch of colour