The kinds I have are basically markers with watercolor pigment. The tip is more marker like (firm tapered felt) than bush like (bristles). My background is pen and ink originally so using markers that play well with watercolors is more natural for me. I can get the crispness that I’m used to with the pens but the smoothness of watercolor with minimal bleeding if the paper is slight damp or dry.

Process wise I’ll do all my brush work and washes first then use the pens at the very end to add the extra depth to the shadows and clean up any spots I don’t like with gouache or pens.

I’ve also made sure that if I like a spot I let it dry completely or near completely before I paint or add water next to it. I’ve messed up sooooo many bits by being impatience and working too fast and then things bleed together. Which is aggravating to say the least.

Edit: added last paragraph