This is for convenience, and I don't necessarily specifically mean surfaces, but if there is a way to change all of a type of property at once it would be nicer than setting up a string and basically doing the same thing you would have anyways.
There is no pre-existing method to do this, but you can always write a function so that you can call it on any object:
local function changeSurfaces(object, surfaceEnum) if object:IsA("BasePart") then object.TopSurface = surfaceEnum object.BottomSurface = surfaceEnum object.FrontSurface = surfaceEnum object.BackSurface = surfaceEnum object.LeftSurface = surfaceEnum object.RightSurface = surfaceEnum end end changeSurfaces(game.Workspace.BasePlate, Enum.SurfaceType.Smooth) --Usage Example