1946 Cent

Is it light weight? Looks like acid damage to me.

Weighs in at 3.2 grams

You have to ask yourself, if you understand the coin striking process, how the dies and the pressure applied to the planchet can produce an effect like that, especially in the fields, which are the highest points of the dies. Judging by the inside points of the maple leaf, that coin was fully struck (i.e., metal flowed to the deepest part of the dies), so how on earth did the fields end up like that? Secondly, you can see the rippled effect even on the rim, which shows no other sign of Die Deterioration or die failure.

Short answer is that the coin was not struck like that. You are looking at PMD, probably with acid. Did you get a weight on your coin?

Genuine errors can occur with somewhat similar patterns, like the chrome plating peeling off the die (mortar set) or Die Deterioration causing an 'orange peel' texture over the whole surface of the coin. Your coin is neither. See also this thread: https://goccf.com/t/86498

Right on the button, SPP. An acid bath is exactly what it looks like.

Collector67, check out the 1949 penny on SPP's link. It has doubling just like yours, as well as the rippling and the "wavy date". I think you'll find it's the mate to your 1946.