Can I ever delete Premiere Pro scratch disks folders w/out having offline issues?

[Digirock]

Hey there!
I'm migrating from FCPX to Premiere, so there's a bunch of different things between the apps.
Recently I had the WORST experience while working on a Premiere Pro project after I deleted all the scratch disks' project content (i.e: Captured Video, Captured Audio, Video Previews, Audio Previews, Motion Graphics Template Media). Fortunately I was helped by Adobe support and we could recover the files. 

SO: 
I have this project I've just finished but I'm still waiting for the client to - possibly - point out some adjustments - so I can't and won't change/delete/move anything until is done.
BUT: after the project is definitely finished, I really would like to get rid of the almost 50Gb of files that were generated on this specific project scratch disks. 

1) Is there a way to safely do it?
2) would you recommend consolidating the project to a safe folder on a cloud or an external HD? 
Consolidating the project does save the scratch disks contents? 

Thanks in advance!

[thom_c]

Premiere does have a "Project Manager" feature that allows you to consolidate material with various options ... but the last time I used it (about 12 months ago) it was very unreliable and untrustworthy, failing to move/copy stuff for no apparent reason ... there isn't a straightforward answer to this question, it really depends on what state you want to keep your project in when you archive it, and it can change from project to project - generally speaking, if you keep all the original media and gfx etc assets, and any essential sequences etc you can rebuild render files etc ... it gets complicated if you have linked After Effects compositions etc