I occasionally receive e-mails asking me what beard cover (if any) I use.
I use and recommend a beard cover produced by RCMA (Research Council of Make-up Artists, Inc.). Their BC-2 is the color I use.
I bought it online in 2006 for about $8. I checked here today and the price is now $27. But a little goes a long way; I am still using the same tub I bought back in 2006, although I now need to use less of it since my beard has turned white/gray.