A few thoughts on 'good enough'
1) I've used the Rustoleum spray appliance enamel quite a bit over the years and the only times I've had bumps were under high humidity/high temp conditions. It's not normal. Quality won't be automotive, but should be very good.
2) For what it's worth, when visiting a cousin's shop in the US back in the early 60's, I saw many many Maytags lined up next to each other. There were minor variations in the blue spectrum in them, although they were fresh and new from the factory. So - don't sweat the exact color thingy. If they didn't come that way from Newton originally, I see no reason to worry about it today.
3) It's not cheap, but I have had very good long-term results using J-B Weld 8265S as filler on aluminium and mixed substrates in wet environments. I know it's a bit of overkill, but it seems to balance out my lack of skills very well.
4) There are a lot of these Maytags still in use (many Amish in our area) so I would guess with a bit of patience, you'll find the parts.
5) From experience, I'd make sure the transmission oil is well protected before any major work, whether sanding or painting or using solvents.
Personally, anyone who can make a '50 Buick Special look that good can make a Maytag look great.
Oh, and as daily drivers, these are wonderful washers. For whatever reason, that tub/agitator design just plain cleans.