I'm happy to share details.
First, User:PKM/Textiles/Museum bobbin lace is my worklist. I'm not using QuickStatements or anything for this project, just a couple of keyboard macros I wrote and the "duplicate references" gadget. The rest I'm doing by hand.
In the first round, I am making just a few changes on each item: EN label and descriptiuon, described at URL, and fabrication method with a reference to the museum URL. Here's an example: Q26756759.
Eventually, we could add a citation to the museum site for every statement that is supported by the online catalog. Q26756053 is an example of what that might look like. Where we've added these we can remove the "imported from Wikimedia project reference" but I won't do that unless you want me to.
I've run into a few (four so far) items that are not in the online catalog (or don't appear when I search for the inv. number).
There are also cases where the dates are slightly different on the website (1918 instead of 1916 in one case). I didn't make any changes with that - I wanted to see what you thought first.