Just placed on the market is plastic form liner material which produces a concrete surface of unbelievable smoothness. Called Lustreform No. 2900, the lightweight material can be easily formed into any suitable pattern. Without exception, everyone who has seen panels made with the liner has been amazed at the glazed surface finish. It has been found advisable to follow a few rules for ease of stripping: to limit design depth to ½ inch, make all corners and edges rounded, and have at least a 6 degree slope on the edges of protruding areas. If a relief of more than ½ inch is desired, depressed areas should be of greater width. Stripping will be simple if these hints by the designer are adhered to.