So I did a search but couldn't find much of anything on this topic. I have Meguiar's Vinyl & Rubber Cleaner/Conditioner #40 and used it last summer on the interior/exterior. I found the product to be a bit streaky. My process was to clean the interior with a damp MF, wait for it to dry, spray some M40 on a clean MF, and apply to surfaces. This led to a streaky finish. I would wipe it after with a clean MF to see if it was residue but it remained the same. Is there a different approach I can take that will yield different results? I found for exterior trim it didn't revitalize color as much as I had hoped. What other applications do people use for this product? I have 2 nearly full bottles of this stuff so I would like to put it to use. I'll be getting 303 Aerospace Protectant to use as an alternative, possibly Black Wow for exterior. Thanks.