Not recommended, but you can. It will really depend on what 105 leaves behind. On some paints, 105 can do a very good impression of a fine polish. Just don't expect 85rd/SF4500 to remove anything more than light swirls and hazing. Best to use something in between 105 and 85rd/SF4500
It really will depend on the paint. Do a test spot and go from there. I actually did that combo the first time I ever polished a car (which was my own car): M105 followed by PO85rd. I tried to finish with both M205 and Optimum Finishing Polish but neither one was cleaning up the hazing left by M105. PO85rd did the trick. But definitely do a test spot and then see where you stand from there.