Mirka MR 3" 5mm Non Vacuum Air Sander, MR 350 Clear Semi Gloss Varnish Coats First Second Third At Coats First Second Third At least 4 more Product Epifanes Clear Gloss Epifanes Clear Gloss Epifanes Clear Gloss Epifanes Clear Gloss Thinner Brush Thinner Brush Thinner Brush Thinner Brush Thinner Thinning % 50% 25% 15% 0–5% Drying Time 24 hours 24 hours 24 hours 24 hours Abrasive Grit 220 280 320 320–400 Abrasive Type Dry Dry Dry Wet or Dry Coverage 150–300 sq ft 150–250 sq ft 150–200 sq ft 150 sq ft Remarks Do not sand through stain Sand by hand 100 gloves per box Each unit is counter‑balanced specifically for its 3" backup pad reduced vibration