refilling posca pens w/ india ink

i was reading about Kokua using india ink for pinstriping, and refilling the posca pens with it. anyone used it directly on the blank? i use the pens for color borders right on the foam. t’anks

Howzit nelmo, I would advise you not to use a posca on the foam. They won’t fill the air holes in the foam and will leave a rut in the foam. You can airbrush oinlines on the fos=am or use the Posca on the sanded board before glossing it.Aloha,Kokua