Creating a faux antique finish with pine is very easy. Pine is a soft wood and, as such, is very easy for simulating a well worn piece of wood or furniture. How old you want to make pine look is very much up to you. For a look of slightly aged pine, simply sanding down sharp corners and creating light and dark areas in the paint or stain will suffice. However, by damaging the surface of the wood to simulate years of use you can create the look of old, well used wood or furniture.
Strike the surface of the wood gently with a hammer or chains. Focus on edges and other surfaces, such as table tops, that would likely have been damaged over time through use. This step is entirely optional if you don't want a heavily used effect on your pine.
Sand down sharp edges on the corners of the wood. Pine is a very soft wood and having sharp edges is an indicator of modern wood.
Sand the all surfaces, including damaged areas, with medium grit sandpaper. Sand undamaged areas with a fine sandpaper to create a smooth finish for the paint or stain.
Paint or stain your wood. If painting your wood, consider watering down the paint with about 1/3 to 1/2 water for an old, faded look.
Use fine steel wool on the corners, edges, and faux damaged areas to thin the paint if you have painted your wood.
Use a very fine sandpaper or steel wool to in long strokes with the grain of the wood to create light and dark areas in the finish. This works especially well with painted pine.
Wipe the pine down with a damp towel to remove sanding residues.
Seal your faux finished pine with polyurethane or another wood sealant.
Consider abrading newly stained furniture with common garden soil for a very used look. The moisture in the soil will change the tone and character of the stain in unpredictable ways. Once abraded, wipe the wood down with clean water and allow it to dry before sealing the surface of the wood.