Going to Check Out a "Barn Find"

BrianT said

I plan on putting on some rubber gloves and going at that engine compartment with a shop vac first. There's some pretty nasty **** (literally) under the hood. I'd like to wash everything by hand after taking some pictures of it in the sun.

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I don't do that anymore, I take duct tape & get all the rat **** stuck to it, then fold it & bag it. Depending on the rodent, & how old/dry the droppings are, airborne dust can contain viruses/bacteria that will kill You. By the time symptoms show to be more than "just a cold", it's too late, be careful.
The gloves & bags, & a poke w/a stick to see if they're occupied, are step #1. It's slow & tedious compared, but unless You've got a bonafide sealed HEPA filter & exhaust isolated away from the infested area, it's the way I've done it at work or wherever for the last 20 or so years.
Oh, congrats, looks like a great find Dude!!!