Hello:

Have some very old paint on my concrete foundation that I would
like to remove. Not sure if oil or latex.

Peel A way was recommended.

I also see that there are other, possibly similar, products such as:

Ready-Strip

and, Nitromors Superstrip

Anyone have any thoughts on these three ?

Very concerned about leaving a stain behind on the concrete after using from
the product itself.
Which would be least likely to ?

Thanks,
Bob