The instructions say not to "soak" in lacquer thinner but it should really say do not use it at all. I dip my brushes in lacquer thinner initially to clean out the brush oil and the black finish on the handles began blistering and coming off immediately, I have other plastic handle brushes and have never seen this so it was a bit surprising.

They behave a little different than my other brushes so I'm struggling with them a bit, I think the hair might be a little on the stiff side but they seem like a good value and could do some good work once you get the feel for them.