Sprinkle the pork on all sides with salt. Add to a shallow dish or a large Ziploc bag. Pour the beer over the pork. Remove as much air as possible before sealing the bag (or cover dish with plastic wrap).
Brine for 24 hours and up to 3 days.
Remove from the brine, rinse well, pat dry.
Heat the grill to 500°F.
Brush the pork on all sides with hoisin, add to the grill. Grill on all sides until the internal temperature reads 145°F.
Remove from grill, allow to rest for 5 minutes. Slice and serve.
Notes
Don't over cook! The FDA recently lowered it's reccomended cooking temp for pork from 165°F to 145° probably because they were sick of their moms dry, overcooked ham.
You stil want a slight hint of pink in the center, not pure white and fiberous.