We currently do not have any impact data on specific finishing processes for insulation materials.
A workaround is to model a blend of 1% polyester (or nylon, or other textile material) with 99% insulation material and select Pad-Dry-Cure (or your correct finishing process for applying your DWR) for the polyester finishing process. Use the Apply to Full blend option under the Additional Adjustments window to apply the DWR to the full blend material.
We are working on collecting impact data for insulation finishing processes. If you have access to impact data regarding insulation material finishing processes, we would love to collaborate with you!