Problem solved. Stickers and leftover adhesive gone. First I removed the outer layer of the sticker, which leaves behind all of the nasty glue. I have no idea what this glue is, but it is heavy duty stuff. First I tried vinegar on the leftover adhesive with no effect whatsoever.
1st picture shows the leftover sticker adhesive.
2nd picture is the finished product.
3rd picture shows the secret weapon
, that when applied to the adhesive and rubbed vigorously with a blue shop towel, removed the adhesive.
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