-
I wouldn't use pine for an outdoor project (unless it's something really special like pitch pine).
If you are set on using softwood then cedar is just as easy to work and will survive being in the elements much better wouldn't need treating either.If you already have the pine and are determined to proceed then I'd mix 2 parts mineral spirits with one part boiled linseed oil or tung oil and melted wax from a tealight. Oil finishes are great but in terms of long term protection they sit on the surface and will eventually wash off. Using the mixture I've suggested allows the oil to penetrate the wood much more and the wax helps to form a really good waterproof layer.
Always apply finishes after assembly.
-
As always, I would follow what @Bobbo says, but if you are going to buy another treatment, I really like the Ronseal Deck Protect. It creates a waxy finish that beads water off really well. I try to put it on the deck once a year and it's still looking great 4 years on. You can give multiple coats, but you need to put subsequent coats on before the first one dries or they will just bead off too.
Paging the oracles - I’m having a go at my first proper woodworking project. Pine wood, will be outdoors, plant pot shelving thing. Was planning to treat with Teak Oil. Will this be effective on pine? Should I prime the pine? Should I use something else? Should I apply the oil (or whatever) before or after assembly? Muchos gracias!!