Clean shoes with acetone and a cotton pad. This helps to remove any finishes that may interfere with dye absorption. Remove laces and set aside. Using vinyl tape and an x-acto knife, tape off sections of the sneaker that you'd like to keep white. To create your dyebath, fill a stainless steel pot with 3 gallons of hot water. Cover pot and heat water on stove top to just below boiling (or 180 F°). Wearing protective gloves, carefully add hot water from the stove top into two separate containers for dip dyeing. Wearing gloves, add 1/2 bottle of well-shaken DyeMore for Synthetics in Sapphire Blue and mix well with tongs. In the second dyebath, add 1/2 bottle of well-shaken DyeMore for Synthetics in Royal Purple. Carefully add half the sneakers into the Royal Blue dyebath and keep submerged for 5-10 minutes or until desired color is achieved. Sneakers will float to the top so make sure to keep it submerged with tongs for the duration of the dyeing process. (Optional: You can also toss your laces into the dyebath). When desired color is achieved, remove sneakers from the dyebath. Give it a quick rinse in warm water. Add the other half of the sneakers into the Royal Purple dyebath and keep submerged for 5-10 minutes or until desired color is achieved. Rinse in warm water and then gradually cool water until rinse water begins to run clear. Allow sneakers to air dry.