Wow. A purple plant purchased around Easter was not at all suspicious to you! Easter colors are yellow and purple.
I would not waste time trying to peel the purple off because more then likely, the damage is done.
The growers put paints on these things hoping you'll buy them solely because they are theme colored for the holiday. You bit, you bought it and now have to deal with the aftermath.
Simple advice: if it does not look natural, don't buy it!!!!!
Use your experience. How many brightly colored purple plants have you seen around your area? How many gold ones? How many solid blue ones? NONE
They don't invest time trying to genetically engineer something in an attempt to entice you to buy it. That would be too costly!
Better to just use paint to achieve their goal. Quick and not much cost.
I hate to go with an old joke here but I will. If some one offered you a good deal on the Goldengate bridge, would you buy it?? Of course not, it couldn't possible be for sale or that cheap! But you bought your own bridge in the form of a purple plant!!! I might sound a little harsh to you but it would be a good idea not to believe everything you see, develop a bit of suspicion.