Need to "Flatten" Beadboard for Veneer
My bathroom has a 3/4" oak beadboard wainscoting that I plan to cover with veneer. For most of the project, I will construct veneered panels from MDF and glue/screw to the beadboard.
There are several places, however, where this is not feasible. Additionally, removing the wainscoting is not a realistic possibility, either. I think I need to apply the veneer directly to the beadboard.
The question is, what do I use to "float" the beadboard and make it flat?
A friend suggested Bondo, but I have no experience with this, and I am concerned about the fumes. This is not an easily vented bathroom and the fart fan doesn't work very well!
I tried some wood putty, but even a small area would take forever, and it doesn't cover or even stick very well. I is a real mess!!
I was thinking of thin-set mortar or drywall mud, but neither of these seems like a particularly good substrate for veneer.
What haven't I thought of? Any suggestions?