I would not use rapid fix with Albumen. Use a standard fixer - I use TF-2. I make my albumen from the egg whites sold in the grocery store - they come in a container like a quart milk container. I then make a large quantity of paper over the following weeks and let it age by air drying rather than using alcohol, though there's nothing wrong with the alcohol method.
I'm not usually a magic bullet believer, but the Richeson brush is one. Search the name here. It has very soft artificial bristles that do not absorb the silver nitrate the way others do.