Good news, Vernon: Tracy replied via email to me, so I'll copy/paste that here:
"Here's what I recommend Vernon to do. Almost the same as a regular compression test.
First, pull the fuse for the fuel pump. Remove the wiring plug for the injector on the affected cylinder. Pull the spark plug on the affected cylinder. Block open the throttle plate. Rotate the engine w/ the starter to get the piston in the affected cylinder down to BTC or close to bottom in the bore. Then squirt in SO thru spark plug hole, trying to hit the cylinder bore wall and avoid the piston top. Probably use a 10 CC syringe of SO, just use part in first application. After adding the SO, check w/ a light to see results. A borescope would be ideal to look, if available.
The SO, needs to be on the bore wall to work, easier if it's a V engine, harder if a vertical 4 cylinder. If the SO lands on the piston top, maybe squirt in a small amount of oil to rinse the SO over onto the piston edge/bore wall. When it's known that the SO is on bore wall/edge of the piston, THEN use starter to roate engine thru several rotations to spread the SO on bore walls/rings. Repeat 'till the SO has all been applied to the bore walls. IF the starter rotates the engine fast, then use it in short bursts to avoid spraying the SO out thru the spark plug hole.
Thinking about it, I think after all the SO has been added, I'd reinstall the spark plug to keep the SO from being sprayed out of the spark plug hole. THEN use starter to rotate the engine to spread the SO around the bore. If I saw that some of the SO had got on the piston top, I'd squirt in some oil to help rinse it to the edge of the piston, and wait a bit to give it time to get to edge of the piston. Plus if I added oil, I would draw it up into the syringe and use that to get as much SO out of the syringe as possible.
Obviously, once all the SO had been added and I knew it had spread over the bore wall, then put it all back together and start it, expecting some smoke for a minute or two. And, if I had to use oil to rinse the SO to the piston edge I'd try to use just enough to do that without over-doing it.
Tracy"
I'm guessing You'll have some thoughts about how to apply a fairly even "bead" of the Snake oil to the circumference of the piston, where it meets the block wall, especially if you have a borescope to take a peek inside while you're doing that...maybe an extension to the nozzle of the syringe, using a small diameter hose? Heck, if you're going to go that far, I would do all 4 of the cylinders that especially if I had a way of seeing what I was doing. It might take time and effort, but directly applying it to one of the main surfaces we want treated probably makes it take hold that much better and likely faster than waiting for the hBN to circulate through the whole oil system.