It is imperative to note that ITC on WC services is blocked on ‘construction’ of immovable property (other than Plant & machinery/ further supply of WC). ITC for routine repairs/maintenance is not blocked.
Essentially, ITC is blocked if expenses are capitalised in books of account (allowed on revenue exps.) as per section 17(5) which is as follows
"goods or services or both received by a taxable person for construction of an immovable property (other than plant or machinery) on his own account including when such goods or services or both are used in the course or furtherance of business.
Explanation.––For the purposes of clauses (c) and (d), the expression “construction” includes re-construction, renovation, additions or alterations or repairs, to the extent of capitalisation, to the said immovable property"
So if you are capitalising such paint expenditure then it is not allowed, however if such expenses are charged to revenue ITC is allowed.
Further , there is time limit avail ITC i.e till for FY 21-22 is Nov 30th or date of filing annual return whichever is earlier as per section 16 (4).
However there is no time limit to reavail ITC, if you have originally reversed such ITC owing to non payment of creditor dues within 180 days. In your case , ideally you were supposed to avail and reverse the ITC in the month to which such invoice belongs to. Now upon payment you could have re-availed the ITC.
Since originally you have omitted to avail and reverse ITC earlier, now department may challenge your claim on grounds of expiry of time mentioned under section 16(4), since payments belongs to FY 21-22 and your original claim of ITC is after due date to avail ITC.
Disclaimer: "My Opinion. Not to construed as professional advice"