The Eagles were 3 up at half time with goals from Serbian trialist Goran Maric, Johannes Ertl and Kieran Djilali. Simon Thomas scored the fourth in the second half.
Patrick Kisnorbo played for 45 mins. The former Leicester player has been training with Palace. Another triallist, Danny Maguire from Q.P.R., played for 70 mins.
Palace fly off to America on Saturday to play two matches against USA opposition.