Bad brake job, have some Q's..

[Kurn]

If you got new drums they are generally coated with a cosmoline type substance,to prevent rust.This has to be washed off prior to installing them.If its left to "burn off",then your brake shoes could become contaminated,and/or your drums could overheat.Take it back and ***** until it's done properly.

 

[OntarioVanMan]

If they are drum brakes then adjustment is required every 20,000 miles (read the owners manual) as the auto adjusters just do not work fully or properly. I know this as I had to have my gm adjusted several times over 5 years. For some reason the auto adjusters just don't work as well as they should even though they have been in vehicles for over 40 years! So if they rear drums are replaced or turned or the shoes replaced then they should be adjusted to proper level and you'll know the difference in braking.
For disc braks then no adjustment required as the auto adjust on the fly. Can't think of any coating on the parts that would make a burning smell but if the mechanic got the parts dirty as others have mentioned then possibly.
Rob

most people don't go in reverse enough for the auto adjusters to do the job....so a couple turns with the spoon would tighten them up a bit...

In the cab biz we actually took them off because of all the reversing we did and the brakes would be too tight....

 

[guido4475]

I prefer to replace drums and/or rotors as opposed to turning them.Easier to warp the thinner they get as a result of turning.And buy parts from a reputable supplier, like Napa !! Stay away from that Duracrap!!