we have a large decked area around our home made from scaffolding boards this has been so succesful we had another area done i treat the boards every couple of years with cuprinol wood preserver i had half a tin left over and proceeded to stain new decking 3/4 of the way through i ran out and have been unable to match color so i opted for the black ash thought this would go straight over the top !!! all that has happended now is i have alot of miss matched boards and they look alot shinier than the original tin can anyone advice me if i could now undercoat or if i could use something else to cover all many thx carol

carol, August 2012

Unless you paint it, I'm afraid the only way is to sand down the whole area back to bare wood before retreating.

Big Softy, November 2012