Need some help from a rust guru!

I just get the cheap stuff at Walmart or Lowes let it set a little and scrape with a blade. I was getting aircraft stripper at Auto zone the price doubled. Auto body supply house? Can't afford it.
Pretty sure its not available at Walmart or Lowes. It's not the same. It doesn't work. Really put a monkey wrench in my game. I agree with you totally on your operating procedures. A working product just isn't available any more. Sorry for the high jack but it is somewhat pertinent.