The only thing I see that may help and has not been mentioned, are the lines left by what you are using to aid in pulling out your chisel. One thing that helps with that is polishing your chisels. Some say to rub some beeswax on your chisel, I don't see any difference with wax. One thing that I have started doing is pulling out of the scrap underneath first this use as little pressure as possible. Sometimes set the strip between the chisel and the edge, it is less noticeable out there.
Hope that helps,
Brian