Alright, did some spray-painting last weekend... I used "universal enamel" spray. Here are the results: I did some tests and the resulting surface is nice to paint on using Vallejo's acrylics... That said, spray-painting isn't fun: way too uncontrollable for me. And you end up breathing in paint, ugh. BTW. When I did the painting tests, I'm unable to avoid covering the black lines... Maybe I'll just let it go and paint them over. I guess there is a method to leave these grooves black, but it's not my level on skill... Question: any advice how to paint good-looking Chinese or Japanese script for the subway station's name?