Originally Posted by spclark

Heard of using SeaFoam for that, never had need of trying it for m'self. News to me WD-40'd run an IC engine. Prolly not for long, as you indicate.

Pretty pricey solvent.

Certainly is popular seller at the ACE Hardware store where I work. Cases fly out the door during our annual Sales Fair event. I keep a can handy as well.

Pretty good for the money

Kroil's an outstanding penetrant. Discovered it when I was shooting competitively, works great for loosening copper or lead barrel fouling. Smells pretty neat too for a solvent. Only drawback I have with it is availability; it's not commonly stocked anywhere I can get to conveniently these days.