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The technique I used on a few hundred of these discs was alternating between simple mineral oil and a soft sponge to work it in, and Windex to remove it (using a different sponge), rinsing with distilled water. Each disc came out remarkably clean visually, audibly, and provided a very clear transfer. However, before using this on a given disc, I had to inspect the edges carefully to make sure the lacquer coating was not peeling away from the metal core. If it was, I had to be extra careful not to get any moisture underneath. I did not lose or damage a single disc. Jeff On Sat, 18 Apr 2015 10:55:59 -0400, Doug Pomeroy <[log in to unmask]> wrote: >Tom, > >Duane Goldman's product is excellent, and I'm glad to learn that he >now makes available (?) a stronger potion, since the regular version >is not very effective on extremely heavy fatty acid deposits, even with >repeated applications. > >I can tell you ammonia (active ingredient in Windex) does work, but it >is not as effective as mineral spirits (paint thinner), or naphtha (Ronsonol >lighter fluid). Be careful not to breathe the fumes! > >I have used all these solutions and have never noted any deleterious >effects on the lacquer, but I've not made a scientific study of the matter. > > > >Doug Pomeroy >Audio Restoration and Mastering Services >193 Baltic St >Brooklyn, NY 11201-6173 >(718) 855-2650 >[log in to unmask] >=========================================================================