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The bonding/grounding system is to protect from both inside and out. Ground to diffuse any discharge or static. To guide lightning strike as directly as possible. And to protect against current from other boats or sources in a marina. Often see aluminum hulled boats hanging zinc "fish" over the side in a marina as sacrificial material that the current will attack before the hull, prop, shaft, struts, fittings, etc. Also have to be aware that lightning will often take out a thru hull transducer. Keep wooden plug close to that thru hull.
When I worked on aluminum hulls, I was taught to have every crew member empty their pockets before coming aboard. Pennies were what I was looking for. Over the side.... A lost penny in an aluminum bilge is no good
Paint looks awesome, Mike. Mount a mirror under each block before you put the motors back in. Makes it real easy to spot a leak.....
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