DIY Doctor UK DIY Forums

Plan to have stained concrete floors in hallway and under stairs. Current surface is concrete which has some paint and cracks. It is about a 10m squared area. Some areas get damp- had problems with previous wood floor buckling. Seems I need to do some damp proofing before laying a self levelling screed?
Current plan:
In the process of removing skirting boards then-
1-scabbling to remove paint and prepare floor
2- ?tanking slurry or epoxy layer
3-self levelling overlay
4-water based concrete stain
5-sealing

Does this sound sensible? Am I missing anything?
How do I know if tanking slurry and self levelling overlay will be compatible? My biggest issue is trying to choose the best materials- have already chosen a stain and seal. Would prefer quick drying/curing as trying to complete start to finish in 4-5 days. Top tips welcome.
Thanks!

Update:
Have done further research and plan is now:
1-scabbling
2-bitumen paint- 1 coat
3-acrylic primer- 2 coats
4-high performance self levelling overlay
5-water based stain
6-sealant

Does this sound sensible? I had a company tell me that I couldn't use bitumen paint, but it seems like it is often used like this. Should I put something else down on/in the bitumen or primer (e.g. sand) to additionally provide a key for the overlay?

Thanks!