This has been discussed countless times here, just search this Forum. We do not endorse amateur polishing here, on the contrary, we condemn it as an activity which destroys swords. You won't see a sympathetic reaction to what you have written here, and if anybody reacts, it will be in pretty harsh words.
Your "I only polish junk"- excuse will not be accepted, as only a properly trained polisher is able to determine what is junk and what is not. We have heard it many times from amateur "polishers".
Nothing personal, it is just that we care about the preservation of Japanese art swords.
BTW, you are an AMATEUR polisher, and not A_MATURE polisher... (despite your ten years of "experience")