Well rebuilding 200k block and water jacket has ---- ton of deposits in it. I used a shotgun clean kit and purple eat your skin cleaner but cant get all of it off. Yellow deposits were softer and was mostly removed, now there is still some more white deposits and shotgun cleaning kit and purple ---- isn't working to well. Any other methods of removal that will work better? Maybe CLR(Calcium Lime Rust) ---- you get at the store?

 

Take it to a machine shop and have them hot tank it, cost's like $15 and gets all that ---- out.

 

They said they did that, gotta check the detailed bill.