We sell thousands of liters of Screen Goo annually for hundreds of different applications from theme parks to private and public venues. Users draft their plans, measure their projection surfaces, select the materials and either hire a painter for a couple of hours or roll up their sleeves and do it all by themselves. The 100’s of photos and videos published attest to the fact that with a little bit of patience and a bit of common sense it all comes out unbelievably well in the end.
There are quite a few Screen Goo installation reviews all over the internet.
Here is one out of the United Kingdom that describes the process of selecting a product then doing the work to great results: https://www.thesilverhedgehog.com/product-review-screen-goo