Hi Bill
Looks like a real "bleeder" to me.
I would spray(lightly) with a acid rinse and blot,
if any transfer leave it alone, but dry it as quick as possible.
If ok try a test with fibre/ bonnet shampoo with some acid rinse added
then you could go over with a fine mist and rub (gently)with nappies,
or wet nappy wring out untill almost dry and rub over.
i have done this quite a few times and you can get a good result.
good luck
Daryl