The garage-door edge takes weather, salt, tires and frequent movement. It can also reveal old spalling, chips, failed sealant or an uneven transition that is easy to miss until the floor is otherwise finished.
A coating project should include a close look at this threshold, along with nearby drains, steps and wall edges. Preparation and repair decisions are most useful when they happen before decorative layers are selected, not when the crew has already reached the doorway.
Include a low, close photo of the threshold when you request a quote. It helps us understand the condition and explain what the finished transition can realistically look like.