Hi. How do you go about making a drywall regular sheetrock wall... look like concrete? Is there a special thin layer concrete drywall you can overlay? can you apply a thin layer of concrete over existing walls as texture? please advise! i have seen this used in local businesses but dont know how you do it. i want to remodel an apartment home i am buying. i want the ultra-modern look with concrete wall in contrast with bamboo or wood floor.