Photoshop separations for screen printing shirts: help?

[Randalls]

Nice painting, Decay. I would check examples of the printers past work along with a quote. The white under the colors would be a definite as the others have said. 4 color process would be the cheapest way to go, I don't think you want that San Francisco style hand pulled screen for this project although you might want to go for that. You could also use heat transfer but I couldn't really suggest anyone. This would just be as an example.

https://www.versatranz.com