preserving the koftgari

[Valjhun]

hi there,

I've bought a couple of indian weapons recently (yes, not my area, but they just too nice) and so, I would be gratefull if you give me some hints how to preserve the vanishing koftgari work. Is it enough to oil it (maybe with wd 40) onece in a while? Have you any expirerience with preserving laquers ecc.?

Thanks in advance.