Nonporous surfaces can be dusted with commercial dusting powders to assist in identifying and enhancing ridge detail.  The powders adhere to the moisture in the latent print.  When surfaces are amenable, they may be processed with cyanoacrylate (super glue) fumes prior to dusting to stabilize the ridge detail.

The images below show a vehicle with no visible ridge detail (upper left) that, after processing with fingerprint powder, revealed an abundance of ridge detail (upper right and lower image).