New Garage floor paint
From the provided product manual:

(Proper surface preparation is required.) All surfaces must be clean,
sound, dry and free of any dirt, oil, and grease. Uncoated Concrete or
Masonry Surfaces: Allow new surfaces to cure 30 days. Clean and etch
surface using a product such as a muriatic acid etcher (read and follow all
manufacturer’s label directions) to achieve a textured profile similar to 150
grit sandpaper. Previously Coated Surfaces: For a painted surface in sound
condition, use a product to clean and prepare the surface. If the coating is
failing or peeling, use a paint stripper to remove old coating or scrape/sand
down to a sound concrete surface. Scuff sand glossy surfaces. Clean and spot
etch any exposed concrete. Remove all dust with a damp cloth, allow to dry.