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marc rosen marc rosen is offline
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Default How do you determine what the finish is?

Hey All,
I am repairing a door to a bathroom vanity for a friend. Sadly, the
cabinet maker passed away, but I must say that he did a beautiful job
- cherry rails and stiles, cherry ply for the panel, great finishing
job too! It is a clear finsih but I could not tell if it is lacquer
or polyurethane. The crack is in the hinge stile of the door (someone
walked into it the wrong way when it was open and stressed the stile)
and I can make it disappear when I dry clamp it, but the finish shows
evidence of the cracks.
Would I encounter any problems if I ;
a) use polyurethane over lacquer?
b) use lacquer overpolurethane?
Is there one best way to go about this?
I want to add that I would make a test application on the unseen
bottom edge first but I wanted some guidance from this esteemed group.
Thanks in advance,
Marc