here's a little guide
turn on nfsw
turn on the freeze trainer
go in the safehouse
choose a car without a bodykit on it
go to aftermarket shop and then u can click either F1 or F2
then get out of the aftermarket and choose whichever car u want to remove it's spoiler or hood
take ur car and go to the paint shop and then just choose another paint and save it. Then just get our of ur safehouse and it's done. U'll either have the stock spoiler that the car has before u put a bodykit on it,or no spoiler (matters from the car)
also u can the color of ur car back to what it was before u had to repaint it,the spoiler will dissapear again,but it'll just be the same as the first time