Thanks for the compliment. I am proud of it, in fact it got the Gold Award for the 70's decade trailers at the International this year.
Now, OMG you are 20yrs old!! You are an ambitious entrepeneur for one so young. You have great ideas and plans. My compliments.
As you have noticed, there are as many ways to polish a trailer as there are people who polish them. My advice is to listen to what they have to say, pick out the wheat from the chaff and develop your own technique using what you have learned from experience and what you learn from others.
For example, 5000rpm on the buffer seems dangerous for the aluminum skin. You may have a technique that allows you to use that speed. If so, good for you. Since you are not doing other's trailers, then if it does present a problem, it will be on your own unit. The fact that you are experimenting on your own equipment is laudable. There is no liability involved.
Have you looked at www.perfectpolish.com
for some insight. There is a link to a site that goes through the whole process. I got most of my information from there (along with all my polishing equipment).
Good luck in your endeavors. It is refreshing to see a young man with ideas and the will to make them come to fruition.