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Old 08-25-2019, 10:53 AM
walking buffalo walking buffalo is offline
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Join Date: Dec 2009
Posts: 9,334

I'm still confused on pertinent details.

To confirm, this is a floor that was NOT newly refinished, just covered to protect from other renovations?

Most importantly, what is the finish on the floor?

Some finished can be buffed and recoated, others can't.

To answer your question, the type of existing finish must be determined.

Assuming the floor was not newly finished, the tape should not have lifted the finish if it was in good shape. This means there are problems with the existing finish and the bond to the wood. This sounds like it was neither the contractors nor 3M's fault.
The tape may have lifted the finish after even a couple of days.
The fault fully lies with an old finish that has decomposed.
The contractors should not be held responsible for the damage.

Recoating over this could cause even more problems.
While the new coat may bond well to the existing finish, there is a significant chance that blisters will grow wherever the old finish and wood are no longer well bonded.

I'm actually fixing this exact problem for a client right now.
A fir floor with Spar varnish reapplied to an old Spar varnish finish.
Blisters are growing wherever the old finish had pin holes to the wood.
In this case, the best solution is a full sand, stain and recoat.
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