My contractor refuses to use wood filler to fill in all the cracks between boards and other imperfections in the wood. Instead, he plans to wait until after the floor is finished and then use a "tinted putty". Has anyone ever heard of this product and/or practice. I think he doesn't want to use the filler because it's time consuming to let dry and lightly sand. If you've been following my posts, this guy has already messed up my floors. I'm trying to decide whether to give him a chance to fix things or to try to find another contractor.