Just a few bare spots? Make a Seed Sandwich!

Locate your barespots and rake clean of any heavy debris.
Apply the premergent over the entire lawn and water in.
After 3 days, allowing time for the herbicide to activate, use a heavy rake to scratch the surface of each bare spot. Scratching the soil surface will break the vapor barrier created by the herbicide.
Topdress each barespot with 3/8 to 1/2 inch Peat Moss or Primerafc seed dressing.
Apply your new seed on top of PEAT MOSS/PRIMERAFC.
Cover new seed with an additional 1/4 inch of PEATMOSS/PRIMERAFC seed dressing. DO NOT USE TOPSOIL. Topsoil contains weed seeds. Keep damp with frequent light waterings.

Postemergence Weed Control

Postemergence applications are used primarily for the
control of broadleaf weeds and perennial grass weeds, but
they also can be used for annual grassy weeds if a preemergence
herbicide was not used or failed to control the weeds.
Postemergence weed control is most effective when the
weeds are young and actively growing, and when the soil is
moist and the temperature is warm. The grass should be
healthy and actively growing except when applications are
made to weeds in dormant turf.
Postemergence chemicals are applied to the foliage of
growing weeds. Avoid mowing for 2 to 3 days before and
after applying so there is more weed foliage to absorb the
chemical and translocate it to the roots. Apply the product
when rain is not expected for 24 hours after application. Also
avoid watering for 24 hours after applications.
Do not apply postemergence chemicals to turfgrass while
it is under heat or drought stress. Water the turf thoroughly
prior to application. Most postemergence chemicals should
not be applied when the temperature exceeds 85 to 90°F
during and after application.