How is Rock Art aged?

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tiompan T
tiompan Dec 18, 2012 19:49:29
Replying to thesweetcheat

thesweetcheat wrote:
Sorry, ideal for weathering or for RA (or both)?
Engraving .

T thesweetcheat
thesweetcheat Dec 18, 2012 20:00:27
Replying to tiompan

Ta, so it's not a definite "no", more of a "possibly/probably not". :)