Varsol= paint thinner=mineral spirits!
works well,I used to cut a degreaser with varsol to make it go farther. but only used the degreaser if the varsol wouldnt do the job itself,takes tar off car paint and wont harm surface provided it's cleaned thoroughly with soap and water. I even cut certain compounds with it when buffing a car to lubricate the compound to stop burning.
As with anything YMMV.
