Many years ago when I was a teenager my dad wanted me to paint our 52 international PU with a brush. It was a really nice rust-free California truck. At the time we lived in Maine so an older truck in that nice a shape was really a rarity. Anyway, He was too cheap/poor to pay for it to be properly sprayed so I went ahead and brushed it. It looked OK from 20 feet by up close it looked like crap. I tried my best to talk him out of it because at best I knew it wouldn't add any value and at worst it would detract from the value of the truck. I still kick myself for doing it.
I wish I could find one like it now.