Hi
It doen't look like you are getting much response form this forum, perhaps because you are not a 'regular'?

I do not know the answer to your question but I must say I have never seen the question asked before. You could always apply more cuprinol wood preservative I suppose or similar if that brand is not available locally to you.

There may be something of interest on this link?

http://www.gomog.com/allmorgan/woodindex.html

good luck and Happy New Year!