mumintrollet

After today’s track event, my rotors get this hot spots or darker patterns on all the discs. Is time for new pads maybe? PFC pads with 8 mm left.

GTTommy

What discs are those?

They look like they are for the bin!

mumintrollet

PFC

Hinz Motorsport

Those appear to be a bit old as it's pretty hard to find any crossed-drilled PFC discs at this point, those are also V2 style discs, which are also basically obsolete. The new replacement V3 style (slotted) rings will bolt up to your V2 hats. The dark spots are more likely just pad deposits. The cracks are getting large enough that you may be looking at replacements after your next event or so. I would have a spare set on hand before your next event. Also, be sure to blow out the brake dust plugging up the cross-drilled holes. When they are plugged it promotes cracking.