Place flour into a bowl and add salt, baking powder and mix gently. Add softened margarine and mix just until dough is crumbly and about the size of small peas. You can mix this with a dough cutter or the best method is with your hands, making sure the flour and margarine are mixed well. Add milk and mix, just until the milk is combined with all of the flour mixture. The dough will be real sticky. The key to success is not to overmix your dough. Place a generous amount of flour onto the table and place dough onto flour and work it around until you can roll it out to a thickness of 3/4". Cut with biscuit cutter and place into a pan, keep them close together in pan so they rise up, not outbsp. Bake at 325 degrees for about 15-20 minutes. Check center of biscuit for doneness. Brush the tops with a little margarine.