I had 22 yr.old shag. It's gone now. I had awesome results using this method: Rip out carpet, carpet holders, pull out underlay, use pliers to remove staples, hammer in any nails using a tool to drive nail head so it is sunken underneath top of plywood. Use floor leveller (for wood) and fill holes in floor. Sand. Vacuum. I went to buy mistints for the floor @ 5.00/gallon. I used latex for easy clean-up. I painted 2 coats, let dry 48 hours, so it's hard. Then in my daughter's room, I used chalk and made a huge daisy in the middle of the room. Then made swirls of white paints all over. In my son's, I made a race track all over. Painted in the designs, waited 24 hours. Bought marine varnish, cheap. Brushed on 2 coats, waiting 48 hours between both. Has a brilliant diamond shine, did turn the white paint yellow, loved it! Has had NO CHIPPING in over 2 yrs of 8 and 4 year olds running through! Make sure you wait a long time between coats of paint so that it is hard when you put the next coat on! Hope this helps you! Email if you have any more q's!