The tolex on the old Peaveys usually cleans up pretty good, but it requires a scrub brush with the deep graining they used. A little steel wool will clean up cab corners if they are pitted. I have that amp's little brother, a TKO 80, I ported the cab and it is unbelievable how much it woke up that amp. I have nothing against sealed cabs, but those old Peavey's had pretty low-volume enclosures that really seem to work against the speaker at lower frequencies. But that's a cool old amp, enjoy!