[John Bartley]

There was a product that I used fifteen years ago that would strip anything, including polyurethane products. It was bio-degradeable, water soluble, essentially odorless and could be left to dry on a surface, then wetted and reactivated without damage. Sounds too good to be true? It was EXPENSIVE, but it worked ...

It was called Multi-Strip-Pro and came from a company called "Back To Nature". I don't know if its still available in the USA. It appears NOT to be in Canada :

https://www.sunnysidecorp.com/products.php?p=r