Stop in for a cup of coffee
Here is a wood stand you can make up for laying the crankshaft in so it is easy to work on at bench height. (a little terrycloth on crank journals where it sits in the stand to protect them from scratching).
Can have someone lend a hand and slowly turn the crank while the next person works the 3' band of emry cloth to polish the crank shaft journals, same with the final polish with the Crocus Cloth too.