bloke doing my floor has replaced some damaged timber boards with new wood. The idea was that he would then stain them to make them colour fit in with the old boards. Thing is he's varnished them already with a water based varnish.
I'd like to stain them to match the older boards and would appreciate any advice about what I'll have to do to prep this new (varnished) timber so that the stain will take. I'm thinking of using a water based stain.
Do I have to re-sand the new boards to remove the varnish, or can I get away with rubbing down with some kind of solvent?
any ideas gratefully received.