[CadRhino]

Thanks for everyone's input. I am a little wigged out by caustic acid so will try the slow rpm milling into steel and see what that does. Thanks

I dont know if this a correct way but I put the cutter in the Bridgeport and cut into a block of steel at a low rpm, usually the aluminum will come off at some point.

Sounds like the caustic is a better idea....

[WOTDesigns]

Thanks for everyone's input. I am a little wigged out by caustic acid so will try the slow rpm milling into steel and see what that does. Thanks

I've pulled big chunks out with needle nose many times and thinner stuff I usually run into steel like already mentioned. Works well and only takes a minute to load the steel