Scampin!!!!!!

question for the body guys. As you can see I didnt take the car back to bare metal when i decided to go with a new color. I just had a body guy who i plan on painting the scamp come and look at the car. He said that due to the fact I used a high build primer to prime the car and did some bodywork in between that I should use a good sealer so there are no "rings" from the bodywork. He said 3 coats of sealer and sanded with some 600 and shes ready for paint. Can anyone help me out?