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Just make sure the 'tropical lap' kit from SA has all the right ingredients included : gum rosin, wood flour and castor oil. This mixture was developed by Dr Con Tenukest at Uni of NSW in the 1960's due to the unavailability of polishing pitch in Australia. He passed away in the late 1980's and I purchased his 24" capacity polishing machine for $100 . Though it's now heavily modified , I use it every day in my optical workshop.
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