Should I amputate these flowers?

So I got this GreenCrack prob about 3-4 weeks into bloom. It got some powdery mildew this week so last night I sprayed potassium carbonate last night. Some flowers got sprayed too and the hairs turned brown. Should I cut these off and let the top flowers still go? The first pic is the healthy cola, second pic is effected flowers. Pics taken this morning looks like some PM is back already. Thoughts?

its way to late to spray a real chem like eagle20 but u can try milk and water lots of nonchemical ways to beat pm or atleast hold it at bay till flower is done. green crack can be taken as early as 6 weeks i like it at 8 personally. if u remove it be as gentle as possible and dont let in get airborne.

So what should I do about the burnt flowers?

Cut them bro. Its not worth it. Depending on how badly u want quality or quantity