LOL...can relate. My son{3yr } was down here watching me work...his sister{6yr} was supposed to be watching him and keeping him out of trouble{usually the other way around!} ...he grabs a nearly finished sherman tank off the end of the table...as my heart attack subsides as he's setting it back down, he misjudges the end of the table and it teaters off the end and onto the floor....I didn't like how that one had turned out anyway{before, let alone "now"}.
On a happier note, you could wet sand the body to smooth it out and recoat the blue...by removing the blue down to the white, for the most part, you would get a nice finish still...or let it ride as is. If I had a buck for every time I've knocked over a bottle of paint when detailing{using the magnifying light..things around the table get so distorted} or knocked over a bottle of liquid cement, I could probably pay for the new trumpeter diesel train that's coming out. When it's time to spray paint, it's best to move things way out of the way...I spray on the low side of pressure, but sometimes if I kick it up to 20psi or over the over spray can drift...for your stuff or your dad's...it's just best to clear the table when the AB comes out. Not raggin' on yah, it'll just keep anything else there free from overspray.
As for your painting...don't get discouraged since it takes time and talent getting used to using the AB and correctly thinning the paint for use. I personnally think the modelmaster "sand" is the thickest/worst to paint with an AB to this day...I don't know why that stuff is sooooo thick!
Hunter, my 1st paint job was a kenworth K123...I brush painted it with gloss dark brown for the main body color and then used a flat tan for the accent color and thought it was good...so technically, your doing far better than me right now. {of course, that paint job of mine was 30some years ago}