Michel,
Since the carpet is being uplifted, any filtration marks resulting from nail holes etc can be treated on the back in the first instance.
I would also treat the edge-marks by placing the carpet on a plastic sheet prior to re-laying as this affords easier access for both agitation and cleaning..
For many years Ultrapac Renovate was my treatment of choice for draught marks, but I now find Eco Spotter not only more effective but does not require the 5-10 minutes dwell time.
PS. Mixing Ultrapac with any other chemical can greatly reduce its' efficiency by limiting the cationic effect.