not sure the brand name my job has at work, but i try to avoid it at all cost, use only as a last min resort, when i have used it though, i spray very light coats on at a time n let sit for few mins, brush n re-spray....as mentioned above..does leave it slightly darker then the rest, but when i brush it, it kinda *blends* out....i havent had the clumpy feeling, but again, maybe i havent sprayed a heavy enuf coat to get any clumping, i have though through exp brushed lil sooner than i should have and had clumping, but not if i let the spot sit a few extra mins though. again, i tryt o use it as a last resort, cuz 98% of the time, its really hard to get a good match with what is at my work place