question for you all.
I have a black scrim. It’s an old scrim and hasn’t been hung and stored properly. So when raised you see bits a pieces of debris. I was wonder if I take a small handheld vaccum and just gently vaccum and get that off. Also any other scrim cleaning tips?
Really, that's about all you can do, or take a lint roller to it...a really big lint roller. Don't wash it. If it's really old it's probably no longer flame retardant there should be a test strip on it. There are companies that can re-treat soft-goods and doing a scrim is probably a lot cheaper than doing a big drapery but it is spendy and you'd have to ship it across the country as you are in Fresno and all the companies I know of are back East.
If there are really bad wrinkles or bad puckers let the thing hang for a few days. If they don't disappear use a Hudson sprayer and EXTREMELY lightly mist the area with HOT water. <and I mean mist. if you get it too wet you run the chance of leeching fire retardant out of the material and winding up with salt crystal forming and leaving a white stain.>
P.S. You can make a great soft goods lint roller using double stick tape and paint rollers. If you buy those really wide rollers it works even better.