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A comment on Ask HN: What's the most valuable thing you can learn in an hour?.

Re:Ask HN: What's the most valuable thing you can learn in a... by t-h-e-chief on Wednesday November 20, 2019 @05:51AM (#21582747)
Sand blasting, esp. soda blasting. You can start with cheap equipment and work up from there. If I had to start from scratch, this would be it.
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