Extra arm fat looks akward.Right diet and exercise will help to remove the extra fat and help to build muscles.Strength training is the best way to develop muscles on your arms.It gives proper tonning and lose arm fat. Exercises which help in toning the bicep, tricep, and shoulder muscles you should include,As a part of your strength training routine.You will be able to burn the arm fat by targeting your arm from every angle..There are many exercises which will help you in losing arm fat .For whole arm Push-ups are the best strength training exercise. you can target biceps by dumbbell curl, and triceps by kickbacks...Aerobic exercises are very effective in burning fat. .But one thing you need to keep in mind is -If you want to lose the flabs in your arms, you need to work on the tone of your whole body.