Hi in my living room I have Benjamin Moore Natura Paint- atrium white.. THe window sill has been primed properly and painted.. However, 9 months later- the sill is very easy to scratch. I have some vases sitting on the sill and they have left indentations in the paint.. Has anyone else found that Natura is easy- how can I say- "soft" or easy to scratch and cause indentations????

Thanks
KOS