I did the following before I knew how to do raised gilding or I would have done it that way. You'll notice the white lines are thicker then the above photo's as I didn't have a good pointed brushed back then.
It may be a few months before I post another blog due to being very busy for a two or three months. Do check out this manuscript http://www.columbia.edu/cgi-bin/dlo?obj=ds.Columbia-NY.NNC-RBML.4885&size=medium It was likely created between 1455-1464. If you follow the link it will bring you to the full record about it.