Hi, answering on Pretenders behalf [seeing as im his dad]. We had the front end fitted up and sprayed at a bodyshop [Dawsons] , not because it was diff. to do but because then they could blend all the paint in. Also it was the time that the car whould b off the road. The wings and front bumper r no problem at all. The skirts need a bit of time and patience as they need to b lined up correctly. The skirts on 172s are held on with clips at the top, whereas we had them bonded on with sealent called tiger seal,available from bodyshops. Also to make a good job its best to change all the arch liners 4 172 ones as they r a diff shape and fit probably.
Hope this helps and good luck. Brian.