In a small Mixing Bowl, combine the 1 cucharada azúcar morena compacta, 1 cucharada pimentón ahumado, 1 cucharadita polvo de ajo, 1 cucharadita polvo de cebolla, 1 cucharadita sal kosher, 1 cucharadita sal kosher, 0.5 cucharadita orégano seco, and 0.5 cucharadita cayena (if using). Mix well and set aside.

If using a Grill, preheat it to medium-high indirect heat (about 375°F): light burners on one side only, or push charcoal to the sides. If using an Oven, preheat to 375°F and place a rack in the lower third.

Pat the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas completely dry with paper towels — this is the key to crispy skin. Drizzle the 2 cucharadas aceite de oliva all over the outside of the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas and rub it in with your hands.

Season the inside of the cavity with 1 tsp 1 cucharadita sal kosher. Then apply the spice rub generously all over the outside of the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas, including under the skin over the breast if possible. Press it in firmly so it adheres.

Open the 1 lata cerveza lager o pale ale 12 oz, a temperatura ambiente — beber o descartar la mitad antes de usar can and pour out (or drink) about half of it — roughly 6 oz — so the can is half full. Drop the smashed 1 cucharadita polvo de ajo cloves into the can. The liquid will steam and flavor the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas from the inside.

Place the 1 lata cerveza lager o pale ale 12 oz, a temperatura ambiente — beber o descartar la mitad antes de usar can on a sturdy, oven-safe surface (a small Baking Dish or Cast Iron Skillet works great to catch drips). Carefully lower the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas cavity-first over the upright 1 lata cerveza lager o pale ale 12 oz, a temperatura ambiente — beber o descartar la mitad antes de usar can so the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas is sitting upright, using the can and its two legs as a tripod for stability.

Transfer the whole setup — 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas on can in the pan — to the Grill over the unlit burners (indirect heat), or to the Oven. Cook with the lid closed (Grill) or Oven door shut for 60–75 minutes, until the thickest part of the thigh (not touching bone) reads 165°F on an Meat Thermometer.

Carefully remove the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas from the heat — the can and juices will be extremely hot. Use Tongs and a sturdy Spatula to transfer the whole assembly to a Cutting Board. Let it rest, still on the can, for 10 minutes before removing the can and carving.

Carefully slide the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas off the 1 lata cerveza lager o pale ale 12 oz, a temperatura ambiente — beber o descartar la mitad antes de usar can (grip the can with Tongs — it will be very hot and may still have liquid inside). Carve the 1 pollo entero 3.5–4.5 libras, menudencias removidas, secado con palmaditas and serve immediately.