Those get clogged up on pre patinad copper unfortunately, and a sharpie does not work well on black prefa unless you are trying to hide a scratch. sharpie also doesn’t always wipe off well.

When I was doing roofing the pica dry mechanical pencils made things so much better. Sure a pencil works good on wood, but what about when I have to mark gray sheet metal? You need something that comes with different colors.

My current pencils in use are a Pentel graph 1000 for pro in .3mm which is my top choice. Then I have a kokuyo enpitsu in .9mm which is very cheap and comfortable to use, and a Sheaffer twist mechanical pencil thing that is just really fun to use and has a nice heavy metal body.

I can’t say I would choose any of the above pencils, I don’t even see any lead holders (clutch pencils)!