You will need some plastic bags, can of spray paint (colour of your choice, i recommend pink
), can of clear coat spray, painters tape that is treated to not let paint through
Steps
1 - Tape the plastic bags to the edges of the pads so all the insides are protected, this takes the longest but worth the effort and attention to detail
2 - lay the pad down on some newspaper or other things that can get paint on but would not damage the surface underneath.
3 - Spray the pads with color, keep the can about 6-8 inches away from the pad at all times. Don't worry about totally absorbing every inch of the pad on first go but make sure edges are well covered by paint but not so much as it starts dripping or running down the sides.
4 - give it a few mins and then remove tape and plastic bags.
5 - Once the paint is fully dry give it a 2nd or 3rd coat that covers any missed spots but try to stay away from edges so the paint doesn't get on the insides
6 - let it dry completely and then spary with clear coat, which will protect the paint from chipping off.
hope this helps, use gloves as its a pain trying to wash off paint from your hands.