The sharp, clean scents of lavender and rose waft from the backyard of a brown South Congress Avenue home, where there are just a few rusted kegs, dead grass and a drooling American pit bull rather than the garden one would assume is there. The scent is instead from local natural soap maker JohnPaul Fierro’s laboratory, where he concocts vegetable-oil-based natural soap and body care products for his company, South Austin People, or So.A.P.