I have made many two rows out of the old JD 494A's & 694A Planters the last 6 years. I bought 14 planters one year and made them into two row planters. I never really worried about the rubber on the inside of the press wheels. I did rub off any over spray that may have gotten on the outer edge of the rubber.
If you're worried about the paint on the rubber you can use plumbers grease. It's easy to brush on and washes off with a water hose.