I watched them sand all marks out of it. It's alot like wood.
Sure you don't want to sand too much.
Gizmo will be the true test, if he starts to scratch it then he will get rubber booties!
The Reason Walter has borders and I don't is they said they matched what the manufacturer does.
At first I liked the borders, but realize Walter has bigger steps and cockpit than me, so if you put it on the steps, its like half border, looks odd. I have a border on the swim platform. Concept of the border is to make it look like a finished edge like you had real teak. Both look good.
They also have different color teak and you can get white lines.