Took me about 6 hours from start to finish, it wasn't badly damage to start with. So far this dash only been inside my garage. But I did one couple year ago during winter, I reinstalled it in winter time (i'm in Canada so the dash beeing tested from -20C and up to +20C + sunny days) and sold the car in summer. Nothing happen during this time. It did hold its luster and shape.
The texture gravel guard look ruff, but in person it really not that bad once finish (definitly good for a driver), but the fner texture would have been better.
If you help, let me know, i'll try to help you the best I can