I picked up a very rusty Holley Vaporizer at the Bremerton Swap Meet last Saturday. Both the outside and inside, where the float is, need to have the rust removed. The options, as I see it, from my limited experience, are:
1) Wire Wheel - which isn't too effective in removing all of the rust;
2) Sandblast - which may leave little particles throughout the passages that air hose can't blow out and could potentially damage the engine once in use;
3) Muriatic Acid - which I am told never fully leaves the pores of the cast iron, despite a thorough washing with water.
Any recommendations? Thanks.
I am having some really good luck with vinegar.
Dunk it in white vinegar for a few days, then follow up with a dunk in a solution of washing soda and water.
You can also try soaking in "evaporust" which is available at some parts stores.
I know this is brass and not cast iron but I dipped this in acid for about 1 minute.
I have used evaporust and naval jelly (acid) with good results as well. You can also try reverse electrolysis washing - I wrote an article on that once, I'll see if I can find it.
Here you go..