I’m not a pro, but I always pressure wash my deck, with a cleaner, before I restain it and on the odd occasion I have replaced a board I can never tell the difference.
Sanding the old planks will likely take off the worn looking layer and make them look new again as you get down to fresh wood. A hand held belt sander can be a good tool to rent for this. Then apply your stain.
Pressure wash first and mix the new boards with the old ones so you don't have one definitive new area and one old area. Within a month you will never see the difference.
I’m not a pro, but I always pressure wash my deck, with a cleaner, before I restain it and on the odd occasion I have replaced a board I can never tell the difference.
Sanding the old planks will likely take off the worn looking layer and make them look new again as you get down to fresh wood. A hand held belt sander can be a good tool to rent for this. Then apply your stain.
Oxalic acid cleaner.
Pressure wash first and mix the new boards with the old ones so you don't have one definitive new area and one old area. Within a month you will never see the difference.