Well we used ppg vit c orange on my car and we use the DBC brnad of PPG it is expensive but worth it.My husband always says you get what you pay for and also if your worried about the price then you should not do the job.If he is spraying for you for free then your saving so much cash right there then you should buy the best.He uses k38 primer which is a high build primer then blocks that then uses a sealer then paints.