What is the definitive guide to using S-Cinetone by Paul Rogers?

The “definitive guide” you are probably referring to is breakdown of how to actually use S-Cinetone properly on Sony cameras so it looks cinematic and not flat, crunchy, or weirdly video-ish.

Core principles teaches in that guide and related videos:

• S-Cinetone is a finished look profile, not a log profile
• Expose it slightly bright (about +0.3 to +1 stop) to keep skin clean
• Protect skin tones first, not the sky
• Do minimal grading: small contrast, tiny saturation tweaks, gentle sharpening
• It shines in fast-turnaround work: social content, weddings, corporate, talking heads

Are you shooting on an A7 series body, FX6/FX3, or something else?