You can buy reflective screen printing ink, so once you know what you want on the top you could print it with this, not 100% where you can buy it, there is a screen printers called BEP that do it.
@tomiskinky started
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You can buy reflective screen printing ink, so once you know what you want on the top you could print it with this, not 100% where you can buy it, there is a screen printers called BEP that do it.