Thanks Tim. Mine is relatively new so I will treat it gently. I must've got one of the last ones available around 2013. At that time an eBay vendor had the special grease but it's no longer listed. What grease did you use?
I've been watching for a decent set of Showa forks for my '87T and if I find them I'll be going into this area so at the least I'll need to renew the grease.