I agree Ratter, I purchessed the regular Cuprinol thinking it could be put in an electric sprayer all it did was clog the nozzle so I had to paint the shed by Hand.
If it is a fence with a neighbour, do talk to the neighbour first as sprayed preserver can be even messier on the other side than painted and the spray and also travel a bit.
Yes I fell foul of that one when I sprayed my fence a few years ago, had some left over in the sprayer so decided to spray the open slatted gate on a windy day.
Took me ages to get it off my car when I noticed it the next day, at least it was my car.
Did mine with spray but had other half go on t'other side with a large piece of hardboard held up to stop it migrating.....he did look suitably tanned thereafter...LOL...
I agree with woofgang. Last year I painted mine with a brush. My neighbour did his with a sprayer. He did say he was going to do it but I didn't realise how far it would go.
It went all over my lights . Patio and table. Horrible golden spots.