Remove black stripes on the skin by editing?

I recently picked out a Minecraft skin, but unfortunately it has black stripes.

I also heard that you can still edit the skin so that the black stripes disappear.

Maybe someone can do that or knows how to do it? (Would be very, very nice.)

Which black stripes do you mean

Do you mean that transparent pixels will be replaced by black pixels?

It's the same with me and there's nothing you can do about it.

The ones on the back arms

I mean that you can get rid of these black stripes so yes and okay, too bad thanks anyway.

Then you have to drag the file into a drawing / image editing program, and then paint over the strips.