Yes John, well I can attest that the welds on my 120XXXX look like they were done by a 4 year old, so Honda didn't get it's sh1t together until at least the K1, methinks? Get your frame blasted and paint it, don't powdercoat it, powdercoat doesn't look like anything that was available back then, it's also expensive, and if you chip it (very easy to do when you pull out/install the engine) moisture will get underneath it, and lift it. like it's done on my F2s frame. It's also an excellent insulator, so you'll need to grind it off your earth lead point/s, or your electrics will drive you insane.
Rustoleum gloss black rattle can paint is fantastic, I get my frames blasted, wipe them down with "wax and grease remover" replace the swingarm bushes with bronze ones, and go to town with the Rustoleum. It looks as close to original as anything I've used, (and I bought my first CB750 new) is cheap (just like the crap that Honda used) needs no primer, and is easy to touch up if you scratch it. Over here a can of Rustoleum costs around $8 USD, so for 16 bucks you'll have enough to paint your frame, swing arm, battery box, top and bottom triples, engine mounts, stands, etc.
Or pay thru the nose for powdercoat which is neither authentic, or as durable as good old paint. Oh, and wear a mask, nothing worse than blowing your nose and producing black snot for several days. Makes you wonder how much went into your lungs............
