Process is as follows,
1 Scalp (with Rotary Mower)
2 Scarify (with Scarifying Machine)
3 Rake out excessive roots that have been cut out by scarifier
4 Level, Roll, Top Dress and re-level. Re- top dress as required (trial and error)
5 Fertilise and water in well
6 Water daily
Simple as all that, but rather time consuming if it hasn't been done in quite a few years.