Of all the weird aliens , they never really went with different skin very often. Just a few.

Or fur suits.

Fur humans makes a lot of sense Or scales. Feathers.

Skin like squids.

Penguin skin

Armadillo.

What about horns ? Aside from the andoreans, antenna.

What about crab eyes.

Oh and little mouth grabber hands like crabs.

That would be so handy.

Extra eyes.

Or just extra arms.

So many creative options to explore. but easier to slather latex on the face I guess.