John wrote:
: The wood hardener I was thinking about is actually clear (Ronseal Wet
: Rot hardener). After speaking to the manufacturer they reminded me that
: you need to inject it by using holes, and that its penetration is only
: about 5mm. Also if you need to treat woodworm then that needs to be done
: first.



There's a thin epoxy designed for use on boats, at http://www.rotdoctor.com.
I don't know about finishes, but it penetrates a lot deeper than 5mm.


-- Andy Barss