My preferred way of renovating (unless I learn a better one, never know)
1) Cut grass short (customer usually does this at my request)
2) Double pass aerate (to pull soil to surface). I don't use the extra weights in my WB aerator so the holes don't get too deep.
3) Slice seed 1/2 rate two directions. About 5 lbs/K. Pulverizes the cores you just pulled up.
4) Starter Fert.
I just took a look at a 9k sq footer I did this process with in early Sept. This lawn was REALLY patchy with tufty fescue before. Today it looked SO much better, filled in decent, great color. Perfect no, but so much better. Helps that the customer watered daily for several weeks.
7x14 Stealth SE Enclosed with 48" side ramp
08 Toro Z400 48" deck, 21HP Kaw with EZ Vac twin bag
09 Exmark Turf Tracer HP 36"
21" Toro SR4 Super Recycler
Stihl KM90 Kombi w/ straight shaft trimmer & tiller heads
Husqvarna 125B Blower
Turfco XT5 Aerator
Turfco LS-22 Overseeder
I can do all things through Him who gives me strength.