Very pleased to report that I received my first self-designed PCBs from oshpark, and am very pleased with how it all turned out. There are so many things I have yet to learn about all this, but building my own boards opens up a world of opportunities for electronics as a hobby.
One thing I noticed, though, is that while hand-soldering the through hole parts in, the paint or plastic coating near the soldering would melt and get wrinkly. Is this coating optional, and does it serve any purpose? I know that the value-priced oshpark prototype option is a fixed configuration, but going forward I will be interested in more customized aspects. The various layers to these boards is something I look forward to learning more about. The wrinkly does not hurt anything, but I want to explore the options here.
I am thinking of going without the coating on the bottom, and maybe not on the top either. To me, the gold standard of PCBs are the ones I saw on Audio Research amps, and they had no coatings on the traces, and not on the top either--as best I recall from decades ago.
I note that one thing about desiging PCBs is the convenience of traces on both sides of the board. Nothing I do will be complex enough for more layers, and with the high voltage stuff, I don't think that would be workable anyway.
What the heck, I will show what I did, for better or worse....
Capacitor Multiplier