ah ha...
the magnifying comment shows that if it's my comment on that you're
referring to  ..at least you read it and comprehended.

I'm pretty sure I mentioned old tooth brush and spray carb cleaner..
on newspapers ..........as a low tech very effective cleaning method.

sure works for me ...perhaps a bit labor intenstive compared to some
other fancy method ..
I think good hard work is a good thing ..
so never bothered me to spent say half an hour cleaning a part like a
cylinder head by hand.

heads off in the van  :
it's all about Patience..
and Attention to Detail...
and not busting rusted exhaust studs and bolts off..
and Patience..and Attention to Detail ...

and Patience..
and Attention to Detail ...

and Patience..
and Attention to Detail ...

and Patience..
and Attention to Detail ...

and Patience..
and Attention to Detail ...

and Patience..
and Attention to Detail ...

and Patience..
and Attention to Detail ...

etc.