Some idiot has put Cuprinol Wood Preserve on an internal door

Probably means that you're not supposed to drink it!

No problem at all. I once used exterior grade stain/preserver (prolly Cuprinol) in a bathroom, specifically because it would stand getting wet.

I don't think they are allowed to make anything that decent (=toxic) these days. Remember Sadolin PX65? If you could still get that, I would still use it - fantastic stuff at kepping wood in good order outdoors.

It may have fungicides and stuff like that in it. Its probably not a hazard unless you have kids that like to stick sticky fingers all over it and then lick their hands or the door. A coat or two of varnish would seal it in.

Depends what sort of preserver; what colour; and what you may want to do with the door in future.

I once (a long time ago) wasted my time trying to make good a window frame with filler, and for some reason got the thought that it would be a good idea to put some preserver around where I'd dug out the rot first. I made a lovely job of the repainting except that the green ( :-( ) colour of the preserver kept coming to the surface. And, of course, the filler fell out after a couple of years anyway...

Nowadays I expect your preserver is water based, so when it is dry it will paint over ok.

Don't gnaw it, no matter how anxious you are!

It may be more toxic if you were to start licking the door ... but it's the other way round is the problem ... inside used outside. If you are happy with the way it looks ... then leave it as is.

Thanks all. Much apprecited, as I've a cat and a wee one - think I'll varnish, just to be safe.

Thanks again, LJ