They made a product called Dawn Power Dissolver, I think it was, that worked pretty good, but was removed from the market. I think I still have a bottle in the garage. These days, most guys are using something called Mr.Awsome or something like that which is available at the dollars stores. It has been around a while also, as I remember some one selling it at a model swap meet years ago, like 20+ or so.
Type at you later,
Dan McEntee