so have anyone tried putting clear coat after ur final coat? if so which clear coat is to be used for this roll on project?

heres my brother's car that i finished in 5 days, most part of the car can be wetsanded even more to bring out more shine, but i got really tired...will do it again when i have time..
pics aren't up to date, they were taken as i work on it..the car right now is completed