Can a DrawMaterialOverlay effect be used on a timer?

[RidingKeys]

I don't have an exact code but I'd just like to know if I could use DrawMaterialOverlay and display a material for 2-3 seconds and then go back to the normal screen?

[Jo The Shmo]

Using just the example from the wiki:

[lua]function DrawBinoc()
DrawMaterialOverlay( "effects/combine_binocoverlay.vmt", 0.1 )
end

hook.Add( "RenderScreenspaceEffects", "BinocDraw", DrawBinoc )

timer.Simple(3, function()
hook.Remove( "RenderScreenspaceEffects", "BinocDraw" )
end)[/lua]