Not me. I've tried DIY vinyl repair with one of those kits. Total disaster. I since found a local professional leather and vinyl guy and have had him do a few car restoration projects for me over the last ten years or so (even a leather sofa). But when I showed him a cracked Supra dash, he said no way. He explained that when the vinyl is still soft and pliable and the crack is due to abuse or crash damage, he can often fix it or he has decent luck with backed vinyls like on a seat or door panel that has a woven backing material to glue together. But when a molded foam and vinyl part like a dash pad is all dried out, he said that he can't get his materials to stick and the crack will reappear almost instantly because it expands and contracts with sun exposure vs the old hardened vinyl. I started to reply earlier but didn't want to discourage. I'm hoping our OP finds a solution as there are a lot more Supras remaining than there are uncracked dash pads and often the vinyl trim is all that separates a viable restoration candidate from the scrap heap.