pretty much yup
chips away is basically a bloke that comes round to bodge your car and get it looking satisfactory to your average joe.
if you take pride in your car you wouldnt think about calling them, just take it to a bodyshop.
as for the dent on the edge of a door, i doubt theyde try to get it out, if its right on the edge you cant get to it from the inside as thats where the seamsealer is, your only really able to get dents out that am a good few inches inside the edge of a door