Replacement weatherstripping for casement windows

Dear Swisco Customer Service Representative,

I am seeking replacement weatherstripping for wood casement windows that were new when installed in 1988. The operators were made by Kolbe & Kolbe and I have purchased perfect replacements for those from you previously (EntryGard Dual Arm Operator Product Code 39-031).

The weatherstripping is held in place by a groove on three sides of the window and appears to be some kind of latex or other rubber. It has been sun damaged and painted over, such that some windows don't close and others don't open.

I have attached four photographs. Image 2675 shows the empty groove of a window without weatherstripping. Image 2676 shows a similar view with the weatherstripping present. Image 2676 shows the weatherstripping being bent away from the window (highlighting the paint problem). Finally, Image 2678 shows the weatherstripping from the side partly pulled out at a window corner, exposing the pair of ridges that sit in the window groove and hold the round bead that does the sealing in place.

58-053 nd 1/4" deep and thus seems to fit the illustration of typical for wood windows.

Overall the seal looks like a match to 58-053. Flattened, as it mostly is, the seal measures 3/4" across. Using the measurements posted, it seems like 58-053 would also give 3/4." My only hesitation is that (after decades) the visible part of the seal sits wholly outside the retention slot, rather than symmetrically across the slot. However, the bubble appears to connect to the base directly, rather than with an extension as in 59-055.

Your advice?

One further question (assuming 58-053 is a go). How do your recommend handling corners - cutting the seal and starting fresh on the next edge or, as was done for at least some of my windows, cutting the bubble but bending the "barbed" portion around the corner to keep a continuous piece for the three sides?

Thanks very much. Do you have any suggestions for how to clean the surface on the frame that will contact the new new weatherstripping. At present there is a combination of bumpy and sticky old paint, as well as lubricants of various types that the previous owner applied to try and keep things working.

Thanks again to both of you.