Reusing cable for diy?

I have a floor machine with a 50ft cable that I'll be replacing soon. It's been in regular use the past five years--*maybe* as much as one week of disuse once or twice in that time. As a whole, I'm uncomfortable with the nicks. But there are several lengths that look practically perfect. It's thickly shielded with grey rubber. Would it be unwise to re-purpose this cord for a few diy power cord projects? Relevant (maybe) stats: Power Cord: 14-3 ST Fixed; Voltage: 115V/60Hz; Motor: 1.5 HP / DC Rectified. Thanks, Michael