u/ChronicHaze-

for context i used to wear this jacket to work in a dusty environment, which i know is really silly. i washed it using persil stain remover pods, which got rid of most of the dirt but it seems like there are permanent dark stains as shown. ive tried using a vanish stain remover gel which also has done nothing. any fix for this? it also has a synthetic down filling which i dont want to damage.