Update with new font: https://www.thingiverse.com/thing:3525234
7 dice, perfect for a full dice set
Each die has a standard layout where each pair of opposite faces adds to the same number. For a D6, each pair of opposite sides adds to 7. For the percentile die, that number is 90. D20 adds to 21, etc.
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I use Hatchbox Wood PLA, but others can work just as well. Make sure there are real wood flakes infused into the plastic. All you need to do is a coarse sanding (I use a Dremel with a sanding attachment) and then a fine sand (I use a normal sanding block, fine grit). Clean off any debris and then get to staining. The above picture shows black burn marks. They were achieved by actually burning the dice with a flame after the fine sanding and before staining.