Baseballs: What to use? Ball point pen, best color, blue. Blue is least likely to fading other than the other colors. What NOT to use? Sharpies or other kinds of markers, they will bleed through the baseball and fade away, making the autograph look worse, and less valuable. What baseball to use? You should really ONLY use a ROMLB (Rawlings Official Major League Baseball). NEVER use synthetic balls, here is the difference: ROMLB: SYNTHETIC BALL: As you can see on the synthetic ball, it looks like it's starting to bleed through. In a couple years, it will be hard to see. Other kinds of memorabilia: What TO use: Sharpie most of the time, but make sure its not a fat sharpie, unless you are signing on something big, such as a 16x20 or 30x40 poster... Memorabilia for a sharpie to be used on: jerseys, helmets (including mini helmets), footballs, hockey pucks, golf balls, basketballs, etc. What NOT to use: Most of the time, do NOT use pen, I can't think of a item that you would use a pen on other than a baseball and look good on... Any questions? ASK!