You wouldn't believe me but Boneripper was the 2 model I ever painted. Biggest mistake of my hobby career ever and biggest regret. I was fortunate that Duncan from the Warhammer channel did a 3 parter on how to paint these two. That was made me confident to do it. Also this was a gift from a friend and so I was peer pressured to do it.
Take it from me, save the biggest stuff for last, no matter how cool your centerpiece model is.
But he looks great. I've only every touched up his warpflame and metal bits over the years.