Dealer said no warranty for this toilet bowl.

I had called to their HQ to complain about dealer, HQ said they can't control dealer side.
Yes, my fault. Because it's very heavy and I worry when I unpack it, I can't pack it pack and might get dirty.

Eventually, in the end it's worse.
How to make sure it's crack or just scratches?

I can feel it's some depth, like powdering came out.
Oh Damn! Costly lesson learned Is there any way I could prevent the scartch/crack to further develop?
How to make verify whether it's cracy or scratch?

Yes true! Safety always come first.

Too bad that I didn't unwrap it on the spot during delivery so dealer said they not going to replace.