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I buy mine at Dillons grocery store. In the isle with all the household
cleaning materials. I recently cleaned up a Nitro Ground Shaker and
man, it was like night and day. There is a woman and a man beside each
other on the playfield. They both looked like they were lizard people.
When I got done, it was incredible. I actually rememberd to take before
and after shots! I also did this to a Close Encounters. Another great
example and I also took before and after pics. I use 70% rubbing
alcohol on my Magic Erasers. I think that the alcohol gets down into
the micro cracks and helps to wash out the embedded dirt while the
eraser sands away the top layers.
You can go right through the paint however. I got greedy once and
continued to scrub and scrub on a white spot on the playfield thinking
I would get it even more briliant white. Next thing I knew, I saw the
playfield wood! But, it takes a lot of scrubbing and pushing hard to do
that. Keep your pressure light and watch carefully as you are
scrubbing. You will slowly see the change take place from dirty, to
semi-dirty, to cleaner etc. Like Ray said, it won't get out all of it
but it will look fantastic compared to what you started with.
I also don't use the entire eraser at once. I rip it off about 1 1/2
inch rectangles (width wise) and use my pointer and middle finger
together to hold the eraser and to scrub. It allows me to get into the
hard to reach areas as well as on the open playfield areas.
Doug