Oil, it will give you a far better colour and life span than any paint or treatment.
Absolutely Danish lint seed oil applied every 6-10 months with some very basic prep will make it last far longer than any paint or prep available.Thank you BigBoy
Something like a danish oil?
Oil has to be re applied every so often and you need to prep and clean the furniture every time you do and could be as often as once every 6 months.
Personally I've used fence paint on mine and it's been fine now for several years.
Fences don't require painting every 6 months and neither do sheds.
So use shed or fence paint. I bought the largest pot for peanuts out of B&M and it's black paint. It comes in various colours.
If you want to keep the natural look then your looking at spending like £100 on whatever they use on log cabins. Tuin has a good guide for that and they sell stuff too I believe.
Don't buy specialist paint fence or she'd paint is what you need and will work best.
God no! Modern fence and shed paints need to be reapplying more often than yearly!
Fences and sheds are not made from pine, they are normally pressure treated and the paint you apply is just to make them look good. Stripped pine furniture needs treating not just painting as it has not been pressure treated.