Spray liquid dethatcher ...then fertilize?
 

I have large areas in my lawn that need dethatching. On a
recommendation of a friend I purchased a Liquid Composter & Dethatcher
which is an enzyme you spray on that produces a bacteria that is
supposed to accelerate the natural decomposition of lawn thatch.

It is also time to spread the crabgrass preventer and fertilizer.
Keeping in mind I'm having the lawn aerated soon, please let me know
your opinion:

Aerate
Spray dethatcher
Wait a week
Fertilize

or

Aerate
Fertilize
Wait a week
Spray dethatcher


Thanks to all.

-ba