Bob Ross is a world-renowned painter and television personality who passed away in 1995. He was known for his wet-on-wet painting technique, which he developed and popularized on his TV show The Joy of Painting.
While there is no definitive answer to whether or not Bob Ross paint thinner caused cancer, there is some evidence to suggest that it may have been a contributing factor. Ross was a heavy smoker, and it's possible that the fumes from the paint thinner exacerbated his lung cancer.
There is no way to know for sure whether or not the paint thinner played a role in Bob Ross' cancer, but it is important to be aware of the potential risks associated with exposure to fumes from any type of paint or paint thinner. If you are concerned about your health, it is always best to consult with a doctor.