Shells coated with chlorine-doped polymers deposited in a plasma are needed for diagnostic purposes for the OMEGA experiment. We have deposited chlorine-doped plasma polymer films by using a number of different chlorinated hydrocarbons. Chlorine concentrations between ≤ 1 to ≈ 35 at.% were obtained. Several characteristics of Cl-GDP films such as color, stress, chlorine concentration homogeneity and thermal stability are discussed.