Aluminum Threshold 4" Wide 1/2" High - 36 Inch Length (Black Anodize)

Can these be cut to size?

Would this work for a mobility scooter?

Will this work for a 36-inch door? I ask because the product name says 36.5 in, but elsewhere in the specs it says 36 in wide x 4 in deep x 0.5 in.

Is it painted or powder coated?