Polyurethane insulation removal?

[pmureiko]

I have a vessel with polyurethane foam insulation that needs to be removed. It is very hard and would be time consuming to scrape off. Are there any tips for easy removal?

 

[ihg]

DONT try to burn it off. The fumes are quite toxic.
It shouldn't be hard; the stuff is mainly CO2 and freon gas; the outer surface has probably been painted with a polymer sealant. Hit that with a bowsaw or even lengthwise with a boxcutter and the rest should come clear, even if it was foamed in place.