Finished repairing a pair of scratches on my lower unit that was down to the bare metal. I spent about $45 in supplies and 1 hour of actual labor time. The final appearance is not perfect, but it is functional and protects the lower unit from corrosion.
2 layers of JB Weld
2 layers of Evinrude zinc phosphate primer (0777172)
4 layers of Evinrude smoke color paint (0777177)