अवलेप्यानां यावदुत्पाटितं तावदुत्पाट्यानुमानं कुर्यात् ॥ कZ_०२.१४.५१ ॥
avalepyānāṃ yāvad utpāṭitaṃ tāvad utpāṭyānumānaṃ kuryāt
For coated or plated articles, one should estimate the loss according to how much of the coating has been stripped off.
Quantify loss using observable physical evidence (area/extent of removed layer) rather than subjective judgment.