Ok y’all help me out here. I’ve got my seams done. Now it’s time to rough it up for filler primer. There’s plenty of 40 and 60 grit scratches. I’m reading conflicting info on what to scratch it up with for the primer filler. I’ve read 60, 120 and 240. I typically use roberlo multyfiller. What say y’all?

Then, what grit to (dry) block it with to slick it out (which will be followed with sealer).

What grit to wet sand the sealer before base coat? (This I think I have the answer for on the Ppg instructions but I’ll still ask)

Thanks y’all.