I have tried to wipe this gummy surface off with paint thinner before recoating with varnish, but it was ineffective. Acetone was too effective, softening everything. And just recoating without removing the gumminess doesn't work either - the gummy surface prevents the new varnish from curing.
So what to do?
And then when wiping down the table after dinner one day, I made a serendipitous discovery.
|The ubiquitous scratchy sponge|