Yeah, it sounds like you probably have almost everything you need. Those motors probably aren't that low of rpm. Motors generally run at high rpms and are geared down to get more torque. So, I'd imagine that you could use one of the junk motors. Since you have so much lead acid equipment I'd probably stick with that too. And, seeing as how you only use the scrubber for half hour shots, you can actually get away with a much smaller pack if you can recharge between uses. That'll make moving it around a lot easier. RV/marine batteries will do just fine, just make sure they're true deep cycle batteries, not any form of starting battery.
The main components you need are:
- motor
- controller (optional for rpm control), or contactor (which is really just a huge relay)
- batteries
- heavy gauge cable
- charger
- battery rack
- motor to burnisher connection (belt & pully, chain & sprocket, etc.)
- you'll want some form of gauge to watch how charged/discharged the batteries are
Lets see some pics of what you got.
