Itโ€™s easy to get professional-quality finishes on your prints and prototypes if you take the right steps. In the final installment of his series about building with Bondo, product designer [Eric Strebel] shows us how itโ€™s done no matter what the substrate. How does he get such a smooth surface? A few key steps make all the difference. First, he always uses a sanding block of some kind, even if heโ€™s just wrapping sandpaper around a tongue depressor. For instance, his phone holder has a round indent on each side. We love that [Eric] made a custom sanding block by โ€ฆreadย more