David;
If the gun is refinished to the original condition...without alteration...it is not custom. That being said, any alteration to meet the need of the owner, brings the word to customization of the gun. The increase in monetary value is not a factor.
Useing upgraded wood, non standard engraving, metal sculpting, or fancy checkering all bring the project to the CUSTOM level. Leaving the gun in the orginal condition with new wood and refinished metalwork constitutes a restoration project. Just my thoughts. Many may disagree.
