There are various products that will work on the backing but not sure
about the pine aspect. One product is available at many grocery
stores called "citra-solv" It's an orange cleaner that comes in a
very small bottle and can be quite expensive. This is not a normal
"orange cleaner." Another product that I've found is De-Solv-it.
About $7 for a spray bottle. I've used it all over concrete floors
but never on pine. I think if you worked it with a brush and then
sanded after it dries you'd be okay.

On Jun 9, 9:03 pm, "
wrote:
I've tried cold scraping, hot water....too messy, think it cools too
quickly,have to keep wiping up. hair dryer, last night tried steam
iron held just above pitchy stuff, sometimes it worked and I was able
to peel a liitle off down to floor boards but mostly some top layer
moved but then I'm left with lower layer still.
So far it looks unbeatable, then I thought maybe I'm not the only one,
so I'm hoping someone has already solved the problem in a manageable
way and can offer advice.
I understand the sanding man won't touch it as it gums up his brushes/
sander.
Hoping
Robyn