It appears to me that this is not ich, one clue is that ich should not take place for long periods of time in a discus tank as the temperatures should be above 80 which ich does not do well in. Not saying its impossible but just ich isn't an issue most discus people deal with because of temperatures. On the fin looks bacterial, on the body of the spotted fish just looks like a pimple which can occur from unclean water. How often do you change water? What substrate if any? Salt will help both FYI