Recently Smallman and Westmacott (1959) observed diffuse scattering of x-rays at small angles in quenched pure metal foils. They attributed the effect to double Bragg scattering caused by distortion due to dislocations formed by condensation of vacancies during quenching. Doherty and Davis (1959) noted that surface oxide on aluminium prevented formation of surface pits which were due to condensation of vacancies. Herein are reported small angle scattering studies of foils (25 to 50 microns thick) of Al and an Al-6 at. % Ag alloy quenched from 540°c indicating that a surface film is effective in increasing the magnitude of the double Bragg scattering; escape of vacancies to the surface is reduced.