Would you accept a commission like this?

An oil painter on Facebook asks if anyone knows of a product which will reproduce the craquelure effect of old paintings: he has a commission from someone who wants the painting to look old - even though it isn't. There are products which will produce an ageing effect, although how authentic it looks I wouldn't know since I've no intention of using them. Seems to me that what this chap wants is an accomplished forger, if he can find one who's out of prison - it made me think whether I'd accept a commission like this; and on the whole I think I wouldn't. Partly for ethical reasons - partly because someone might then use the painting to deceive others as to its true age, although expert attention would soon reveal it - partly because I don't really want to spoil my own painting if I can help it - and partly because it seems you only get the once chance to get this process to work, and if it doesn't you have to remove two separate craquelure products and start again. Where is Tom Keating when you need him? If I WERE going to do this, I wouldn't use oil paint - that way, it would be obvious there was no intention on my part to deceive, and technically, it would be a lot easier - you could apply a water-based craquelure, rub a bit of umber acrylic into the cracks, and off you go. But it would still be a pastiche of sorts - something pretending to be what it wasn't: OK for a film set perhaps, but that's about it. Confess, though - would YOU do this?