I picked up some of this stuff, on JFP's recommendation: "ARP 100-9909 Ultra Torque Assembly Lubricant - 1.69 oz. Fluid Squeeze Tube." $13.99 at Amazon. I will of course use it on the compression tool, but it seems to me most fasteners used in the engine would benefit from it. What about flywheel and pressure plate* bolts? Cam cover and sump cover? Cam caps?
*By the way, I've decided to replace the pressure plate along with the clutch disc and throwout bearing. I had intended to replace only the disc and bearing, but I've come around to the idea that I'd be crazy not to put in a new pressure plate while I'm at it.