I have used the electric oven with success at lowest possible temperature - which is C 50° (dunno what it is in Fahrenheit, sorry) and vented haet to get the ball heated from all sides. I put the ball on a grill just in the middle and let it heat up 10 mins. Then the oils starts oozing out, creating a surface glaze. I use either a micor bibre towel or paper tissues to wipe off the oil, grease and dirt and repeat this heating process 3-4 times until no more stuff comes to the surface. Thereafter I let the ball cool down and wipe off the surface either with a grease removing kitchen cleaner (Mr. Clean Orange by P&G is very good - but I am not sure if it is avaliable in the US?) or a special professional cleaner called "Melorud" for plastic window frames, which not only removes dirt of any kinds but also helps restoring the material.
With the oven you should take care that the ball does not change temprerature too fast! As TBK25 mentioned before, fast tempereture changes can cause cracks.
I have also tried the bucket method, which works fine, too, and should be the less risky approach. But again, do NOT pour boiling water into the bucket or shock the ball with cold water after it comes from the tub.
Putting the ball into plain sunlight works fine, too, but UV light can cause harm to the coverstock, making it brittle. I prefer putting the balls in some container and let this heat up with the balls inside. Takes a bit longer, but there is not the danger from direct sunlight. A car trunk works fine, too...
As soon as the oil oozes out, wipe it off and repeat the process until nothing more comes out.
I'll try it next time with a black foil - when the weather is better around here.
Funny thing I found after de-oiling sessions is that the balls need some playing to get back to total strength again?! After 1-2 games they are back, and stronger than before.
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DizzyFugu --- Reporting from Germany
Team "X" league website: http://homepage.mac.com/timlinked/
"All that we see or seem, is but a dream within a dream..." - Edgar Allen Poe