Just made a few 11x14 cyanotypes last night. I used unsized BFK
paper and some cold pressed water color paper. Coated with a foam brush.
The prints are fine. Don't worry about overlapping. What you are doing
is fine. I tell my students to use the old painters motto (house painters)
which is, brush it on, brush it out, brush it in. The paper, when you are
finished, should be damp but not dripping. Judy S. and I and perhaps others
do not think that paper needs to be sized for cyanotype. My opinion is that
oversizing is what causes a lot of streaking etc.
Bob Schramm