The white is from how I laser engrave them. They look like that straight out of the packaging.
That depends on what ruler you have. My standard rulers are a tinted acrylic that has a either a tan protective film or perhaps masking tape on it to protect it while engraving and cutting. I sometimes send out "special"version of the ruler that are actually made from the same stuff as my ACE
WGF cockpits. Those will be white on the front and sometime white on the back. The core will be black however. On those, there is nothing to remove as I have to remove the masking before they are ready to be bagged and shipped out.
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