Mr. 16 gauge,
I have 40 or 50 iron moulds and none have rusted, yet. I put all the mould blocks in a big coffee can. I sprayed the moulds with Rust Prevent for 5 or 6 seconds, place the plastic lid on top and NO RUST!
I degrease the blocks with Coleman Fuel just before I cast. After casting, I put the blocks back in the can, give it a whiff of RP and put the lid back on the can.
Adam
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Adam Helmer
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