Quoted from CryptKeeperAUS:Sorry for the dumb question but I have to ask, is dulling of the playfield area when using a magic eraser (melamine) normal or a sign you have almost removed the paintwork? I have been working on some areas to remove general marks and some cracking lines full of dirt in readiness for clear coating. Shellite did an OK job for a general clean but some areas have only responded to melamine and rubbing alcohol. Having read a few other forums I was cautions and expecting the paint to be removed after a few rubs but it is taking a lot more than that just to make an impact on my playfield but noticing the areas are dulling a bit. Color is still OK when wet with some isopropyl so I'm hopeful I have not ruined anything but unsure if I should keep going on these areas or not.
Thanks.
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Planking will not be removed by grinding down the paint.
It will have to be sealed with clear and then re-painted.