Every time I touched a part I found some surface flaw. The earlier I found the flaw, the better the repair - a quick batch of micro, a little dab of glazing putty, sanded flat and voila, no pit or there is a better transition between surfaces. I developed a rule of making the fix to primer and even the first layer of top coat. But once I was in the 2nd layer of top coat that flaw is something I have to live with. So, I don't have a perfect part anywhere on the airplane. But I do have surfaces that are more than airworthy, and if the look isn't quite right I ask that you step back to 4 feet; it looks great from there.
I sequenced the parts so that the last bit of epoxy wipe was the underside of the fuse. I worked all surfaces with gravity as my friend. That meant turning the fuse upside down to do the underside epoxy. I then moved over to applying prime and top coats, and the first surface I painted was the underside of the fuse, a less-viewed surface where I could learn how to work with this paint.
Below are pictures showing parts post epoxy wipe. They get a weird gloss but still need a healthy session of sanding before they get a prime coat.