I think the thing is too first see what the property was like when you moved in, if it was painted and in perfect condition then you should leave it like this.
If it was not then one can take a note of the problems and ensure that the landlord and you agree on the condition of the property, in fact most real estate agents will do this now for you so you do not have to, its called a condition report.
It is worthwhile for all new tennants to ensure that they get a condition report and that both tennant and landlord agree on the condition.
when you are ready to leave the property this report should be viewed again and any further detioration can be noted - reasonable wear and tear will most probably not incur any deduction.
otherwise you should get your full security refund
