>I have been told by a friend that I can't sell my
>honey and that I shouldn't use it myself because ...<snip>...
> I painted it with HQ brand wood preservative.   ...<snip>...
> My friend is saying that my honey will be contaminated. Is this so?
 
A lot depends on what is in that stuff "HQ".
 
Is your friend offering this "advice" as a general principal or is he/she
picking on "HQ" in particular?
 
Does the label say about the active ingredients?
Does the label have any warnings about toxins?
Have you asked the manufacture?
 
Regards
 
Chris Allen