Caustic Hot tank Dipping?

[RC4MAN]

Back in the day, whenever I had engine parts for a rebuild I would take them to my rebuilder and the first thing he would do is hot tank dip them to clean them. I understand that Ma EPA has put the kabosh on that practice.
I have 2 E7 Mack truck cast iron oil filter mounts that had to get from a used parts supplier in Kentucky as they are a long discontinued item. I need them cleaned and i've had them run through the hot water and soap degreaser cleaner here at work and they still look as you can see. The only other method they have here to clean parts is steel shot blasting which is way to rough.
Can anyone recommend an "Industrial Strength" cleaner or do some shops still do the old hot tank method?

 

[Downeaster]

Oven Cleaner?

 

[gggGary]

Home brew ruster remover simmering in a nesco for an hour or so, they,ll come out looking like new.

Add a dash of dish soap.

 

[ThatXS650Guy]

Ospho works well or get yourself a gallon of Mild Stone Remover and you can make almost 5 gallons of cleaner.

 

[RC4MAN]

There's as much gunk and grease as rust, we have a big tank of Evapo-Rust, I'm leaveing them in there for the weekend

 

[ThatXS650Guy]

There's as much gunk and grease as rust, we have a big tank of Evapo-Rust, I'm leaveing them in there for the weekend

I use my solvent tank for that stuff.

 

[Jim]

Yeah, solvent tank until the oily stuff is gone, soap and water rinse and then into the acid tank.

Oil and grease just pollutes the acid tank.

 

[FB71]

most shops around here do pyrolytic cleaning; cook them in an oven at 400*F for a few hours. Turns all the oily and crusty stuff to ash.

 

[RC4MAN]

Well, combination of weekend in Evap-o-rust, some work in the Safety Clean solvent tank and another run through the Bupi detergent cleaner has them looking satisfactory.