how to make thin and curved lines in gimp
first choose any area in your pic.
than color it.
choose "selection".
click on "decrease".
if its higher than 1 pixel the lines will get thicker.
click ok.
erase anything whats in the selection now.
you should now have a nice curved and thin line. enjoy.
sry that the pics r only below but i cant order them at the moment, if somebody knows how to get a bigger window for a post plz tell me!