I mentioned grit type in another post and referred to some bench restoration. I have just restored three garden chairs, so I decided to share it. Work is going to dry up again with these new restrictions so I can see myself performing a lot of work at home.
The chairs were from Next and about sixteen years old. One had suffered from weather exposure, and two painted with a strange substance. I am not sure what it was, but it felt like creosote!
The unpainted one was sanded first with an 80 grit to break the surface. I finished with a 120 and wiped it off with a wet multifibre cloth to remove dust and particles. I let it dry naturally while it moved onto the painted chairs. I used 80 grit followed by 120, but I then had to use a 180. The grain lifted when I applied my Osmo oil, and the finish resembled sandpaper! I would not usually use 180, but the wood is of low quality, and thankfully, this worked. I used Abranet Ace on my trusty Festool RTS400 sander connected to their dust extraction unit.
The chosen OSMO oil is a cedar colour; my wife loves it. It is expensive for some, but the result is worth it. I use a quality brush, one I reserve for this type of oil. Afterwards, you must clean the brushes thoroughly using white spirit or similar. I have tried using cheap throwaway brushes, but they do not give the desired finish. I also found myself picking bristles off the surface. The oil is best painted with the grain where possible. It is not a forgiving substance, and when you do have to apply it across the grain, you must take your time. Okay, so this is garden furniture, but I am a perfectionist and cannot slap it on like some of the family suggested! I find two coats provide a decent finish and it will last for years.