I looked all over for washing soda when I was building my rust cooker and people had never heard of it. I ended up using TSP. It works but I don't know if it's better than the washing soda or not. I'd like to find some.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.