So I finished the dash yesterday but imo it turned out terrible. The vinyl was too thick to stretch and curve over the a/c vents. The glue couldn't hold it down and it kept lifting up. Also the seams were bulky since I folded them over.
In the end I stripped off all the vinyl and I'm going to start all over. However this time around I'm going use suede. The downside to suede is that its not like alcantara so it will fade in the sun. Knowing this I'm going to do everything in suede except for the top portion which I will still do in vinyl since that area actually turned out pretty nice. I have tint, and always use a sunshade when my car is outside so hopefully I don't have a problem with fading.
I can see why people opt for suede or alcantara instead of leather or vinyl now. The vinyl is about a millimeter thick while the suede is very thin, similar to a bedsheet. It's alot easier to work with and I'm sure I'll have no problems stretching it around curves.
I'm studying rararoy's interior right now, and I actually had a chance to talk to him in person at Wekfest last year. He did everything himself but got his friend to do the stitching for him and as you can see it looks pretty good.
My interior won't look as flashy as Roy's since I want it to look oem, but his interior gives me a pretty good idea of how to wrap the dash.
If the dash still doesn't turn out well after this I'll just order a new dashboard from Sewell Lexus. Regular price is $520 but for my.is members its only $360. The shop I took it to before was going to charge me $500, so even with all the money I spent so far I haven't passed my budget of $500 that I was reserving for this dash project.