Cleaning block, testing laser

[3W Hank]

I has use all kind of cleaning over the years to cars and parts and engine, and all make their own benefits as hot tank, caustic soda, accid, hot parts cleaning, ball blastering, sand blastering, bead glass, diesel/brusch, ultra sonic, steel brush etc.
Today I tested laser and it was a very good method.
Fast, totally clean cast iron, but the block has been into hot tank 3 times before so it was clean, but use cold pressuare water is get rust up fast ( edpecially as fall and moister air outside ) so last bath it was hot pressure.
Rust was almost all gone ( or gone ) in water channels.
But the laser took it to perfect cast iton.
Negative is work as a light, it will not go down if somethings hidden, but perfect after hot tank !
Totally dry ( no rust )
It burn all oil, paint, rust.
Its not great or solve all cleaning problem but I engine parts after hot tank is just perfect, it is 15-20 minutes on a block, 5 minutes on a crank etc.
I’m amazed.
Think if all all possibilitys.
I think a system might cost 5K.