Hello, I am trying to clear off the workbench, and this was next in line. I am considering soaking it in Evaporust, but it looks like the underside, and the fence parts, are painted. Any suggestions/concerns ? This is a Porter Cable 5056 Shaper Top. Thanks, Lou

I'm not a evaporust user, but do use phosphoric acid. On painted items oxalic acid is what has been recommended & used by can collectors. It works but slower than phosphoric.

hello, oldgoaly. Where do I find those products? Thanks, LLou

Ospho is a brand name product containing phosphoric acid.  Phosphoric and oxalic acids should be available at hardware stores or Lowes or Home Depot. 
Al

Oxalic acid is used as a wood bleach, Been a long time since I bought  have it mixed with water in a cat liter bycket, name of the brand was something like "bondex" black/yellow/white round tub.

Hello, Guys. Thanks for the info, Lou

the cheapest and most concentrated phosphoric solution I have found is Prep and and etch, about 20-25% phosphoric acid. 

Hello, Here are the "after" photos, I went with the Evaporust for the castings, and all of the small parts went in the tumbler. Regards, Lou

Looks like the evaporust worked quite well.I bought my first jug of it maybe 3 weeks ago and I'm impressed.

Hello, The stuff works great, you just have to get a feel for the soak time. Try to clean whatever you are soaking first, grease and oil will cloud up the liquid. I try to scrape off the scale, ( single edge razor blade scraper, or a carbide scraper) and then a stiff nylon brush to clean up loose stuff, before soaking. Keep it covered when soaking!! Regards, Lou

Quote from: lptools on March 29, 2020, 07:13:12 PM
Keep it covered when soaking!! Regards, Lou

Good call on the keep it covered.
I picked up one of those under-bed/wrapping paper storage things (large - shallow - wide) for doing handsaw blades.   If the weather stays half-way decent and we don't get more torrential downpours i may do some of the blades i have sitting around.