They are to me. What would be perfect to you? Or would you be able to pick one?

Rainbow is definitely a valid color.
Or uh iridescent.

This one?
https://i.pinimg.com/originals/0b/da...397328b93a.jpg

Iridescent is good enough because it really is amazing.

So they do use a brush technique, but I wonder if you have to do it much dryer to maintain that more splotchy transition between the colors and to prevent them from bleeding together as much.

gimme that shirt >:D

yeah I wouldn't want muddy colors

It would be interesting to try and experiment with it, but supplies would add up too quickly. Which seems to be the way for any craft.

that's always the sad part :(

Yeah, even classes seem to be getting more and more expensive. I saw one for learning how to make espresso but for amateurs, and it was a few hundred for a couple of days.

for true hipsters
the ones with money but choose to look like hobos

It seems like they would prefer to be seen at the coffee shops than making it at home.

The classes are for the ones who like to brag at coffee shops. 'when I do it...'

Heh, that's probably true. I could have learned how to do rainbow latte art, though.

A few hundred are definitely NOT a waste of your money if it's to learn anything rainbow.

I'll just watch YouTube tutorials for you. And mail it to you when ready.

mail it to me frozen inside some hermetic case?

We might need some liquid nitrogen to preserve the rainbow foam, but even then it might not last.