How well will spray paint stay on acrylic paint when wet?


I'm painting a mermaid tail that's made out of 3mm neoprene. I mixed acrylic paint with textile medium and did three coats and the color came out very well. I'm attempting accents today and wanted a faded look, but don't have an airbrush, so I'm thinking of using a blue spray paint on the white acrylic. I'm not worried about the color popping, but rather the color staying on. I will seal the tail with waterproof Rustoleum leak seal, but I didn't take into account using spray paint in my research. Do you think it will stay on?

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