White Diamond Tri-coat touch up paint

The paint code for White Diamond on my car a 95 deville, is PC 8933. I dont think they changed the code for the later models. I do know it was a $500 option on my car. I went to O'Riellys and they mixed up 2 bottles for me, the base, and the pearl, at least that's what it looks like to me. The paint guy told me it would be as close as i could get, he said that I would need to use a clear coat to make it look really good and just to spray the clear coat in the can lid and use a brush to seal the other 2 paints after they were applied. Also I think it was Sub, or Ranger that told me the tricoat doesn't look that good, it looks grey and was told it looks like a search light on the car...lol I was told to get Chillton white by one of the guys, I have both but I am going to try the tri coat paint first as it looks very very close. You can also call a chevy dealer and give them the last 8 digits of your VIN and they can tell you what you have and you can get a pen/brush combo that has all the colors combined. The cost is about 24 dollars. DONT call caddy dealer they are higher for some reason.