Curing of celing plastering.

[pshrini]

I did entire ceiling re-plastering of my home since the one originally done 4 years before in my apt complex accidentally fell off in living room. Currently Curing is ongoing. The contractor person comes every day three times
9AM, 1PM and 5 PM and he does it with the curing pipe. My home is on the last floor below the terrace. (A small party hall covers 75% of my home on the top).

I have following specific questions

1. Contractor told me with three times a day 10 days curing is enough. Any good opinion?

2. How should I identify or test that the plaster has been cured? Is there any way I get an assurance of that from some inspection?

3. What is the best way to finishing before painting? Contractor is telling me he will use Birla Putty which does not really need lime finish. Please comment.

Thanks in advance