I'm 6 months into a trial on my used and abused Chinese bearings (18 months old at start of trail). Outboard gear oil and wheel bearing grease mixed to a custard like consistency. Dust cap stuck on with retaining compound as with the inner seal insert. Filled void between the bearings with the goo before fitting outer bearing and filled dust cap prior to fitting. Bearings packed with grease as per normal.
Average hub temp at port servo car park with standard grease 48-55 deg c. Average hub temp with weird concoction 35-40 deg c. Measured with IR thermometer.
It's messy if you get the mix too thin and also rather messy when disassembling but so far I'm pretty happy with the trial.
To be honest didn't think it would work but so far so good.