If a toned (oxidized) coin should be given a CAM or UCAM description because if it was dipped the cameo effect would be apparent, shouldn’t all pennies be given a RED description?
No, two different things. Red goes to brown and cannot go back to ORIGINAL color. A deeply toned coin that started with a cameo contrast which is now lost (so not given the designation) can be dipped to remove the dark toning and restore its DCAM.