It looks like I'm the only person who doesn't use a brush for this....
Anyway I usually just load a very small amount of a deep red, like red gore, or blood red mixed with a brown, into a small pipette (like below) and literally blow it over the area with it. Works good.
That is a great idea. I have lots of hypos around that I could try the same technique with... assuming I don't want to meticulously paint it by hand :clap:
Can't think what it's called so my searching hasn't produced a picture. At school, to fix pastel drawings, we'd blow fixative (white spirit?) over drawings using a couple of small metal straws, hinged at a right angle. Dangle one down into fixative, hold horizontal one & blow down it, tweak angle until liquid is drawn up & sprayed out over picture. It might be possible to play with the effect for blood/gore splatter. Cheers, B.