The sandpaper seems to fill as soon as you change it, but feeding paper to the machine as soon as it stops cutting is tiresome and expensive, so you just press down harder and use the corner of the pad to stab at those rock-hard globs of epoxy. You stand back and are dismayed to see that the deep gloss of the paint has revealed a patchwork of epoxy runs, sags, and bumps. Here are some ways to avoid sanding misery and ensure a perfectly smooth hull. These remarks refer to sanding epoxy-coated wood, a special case demanding different treatment, as you will see. Don't Breath The Stuff.
Epoxy dust is toxic, period.
At best, expect nasal inflammation, at worst, throat cold symptoms, or sensitization that could keep you out of a boatshop for good. It feels comfortable on your face for long periods and allows normal breathing, whereas the dustmasks always feel hot and scratchy. Shut Out That Noise . Ear plugs, or better, industrial ear protectors that look like headphones, are a great luxury and will increase your endurance tenfold. Invest In A Nice Sander.