Hello!
Thank you Mary! I've had many troubles with larger formats

. It is ground plexiglass, which behaves the same as other smooth panels. Almost nothing can damage plexi. How do I keep my hand so steady? It is placed on the table. I work on a table, not vertically. Here is more info for your questions.
http://forum.portraitartist.com/show...0&pagenumber=2
I found my picture, here is it: