"Ran when pulled"

In my twisted mind if there is any significant amount of water in it, it will find the lowest point in the engine...theboil pan. If not much was in the pan assume good?
Not sure how to remove scale?? Maybe oil up cylinders, remove pistons? Does it rotate?
See all my question marks???? It means I dont reallu know, but 318's are good engines and can take a fair bit of abuse.
Engine turns just fine, I rotated the piston lower but it was almost bottomed out already. There is no scaling below where it was sitting so I am thinking it must have got some water through an open valve somehow. The more I look at it, the more it seems ok I just am not sure how to clean the cylinder wall. The scaling is hard as hell