May I suggest that you replace the soundtrack with an informative voiceover? Turning the sound off made the video watchable but it seems like a wasted opportunity to provide content.
Once painted, is there any max time limit for the initial burnishing? I'm planning on painting the copper coat and leaving her sit for approximately 4 weeks prior to painting the support areas.
There is no max time. This epoxy cures hard, tho, and after about 5 days it's like sanding fully cured West Systems 105. It's easier to sand about 3 days in, before a full cure. The instructions are excellent and are a free download.