The problem with using your Cooler MLT for ANYTHING post fermentation is because they are prone to scratching (be it from your SS braid or whatever you use to stir with) and handle a lot of un-boiled grains (which has lactobasilis (sp?)). These two factors mean that a Cooler MLT will more than likely infect your batch very easily.
"Wisdom isn't "thinking hard". It's experience." - PassedPawn