I am reading info on rubbing finish. There is one thing that I don't quite understand. The instruction indicates that we should thin the finish, let it hardened, and then rub the finish. This instruction may be good for other finishes; but I am wondering whether this is practical for poly. According to the instruction, the poly finish must be thick; otherwise, when I rub the finish, I may run the risk of rubbing through the top coat of the poly and revealing the line between the top coat and the second last coat. But if I thin the poly for the top coat, I will get a thin coat and I will have a high risk of rubbing through the top coat. Something is missing here, right?
Is the idea of "thinning the last coat" more appropriate for other finishes that one coat can melt with the next coat, and multiple coats can become one thick layer?
Thanks for any info in advance.
Jay Chan