Does Roblox not allow surface change "Effects" to happen? (Read for info)

I have a script in a vehicle that will make a part that it hits become all SmoothNoOutlines instead of weld, yet it doesn't detaches itself. It's welded with the Weld surface, not a Weld script! Here's my script:

sp = script.Parent
Parts = {"Part","Wedge","Truss","Brick","part","CornerWedge"}

for i,v in pairs(Parts) do
	sp.Touched:connect(function(Hit)
		if Hit.Name == v then
			wait()
			Hit.BackSurface = "SmoothNoOutlines"
			wait()
			Hit.BottomSurface = "SmoothNoOutlines"
			wait()
			Hit.FrontSurface = "SmoothNoOutlines"
			wait()
			Hit.LeftSurface = "SmoothNoOutlines"
			wait()
			Hit.RightSurface = "SmoothNoOutlines"
			wait()
			Hit.TopSurface = "SmoothNoOutlines"
		else
			print("Condition is Not Met")
		end
	end)
end

I was thinking that I might need to do something like using CFrame and add a very small amount to make it detach itself instead. Would that be better then using SmoothNoOutlines?