FYI, something I thought of and tried today with the blue hose is put a little antifreeze in a soup can, heat it with your torch. Dip the hose in and let it set say 10-15 seconds, have your fitting in the vise ready to go, pull the hose out and slip it on all the way to the bottom. Worked like a charm on the 10AN stuff... ... I remembered seeing this with big hoses when I was 13.
Jim
Jim