I am assuming your talking to me, I did not say my truck had gel coat. I did say my rv had gel coat and I learned that about half way in, it was gel coat(same as a boat)..
ANY moron can buff, sand, prep gel coat. Paint and clear... not so much. Damage can be done in paint easily.
Yes after you ceramic your not suppose to go thru a contact car wash etc. As contact is what wears it down.