[pogden]

Speaking from no personel experience, only from what I've heard here, it's best to do the job all at one time. But any areas that are not fresh(already dry) can be roughed up with a grinder to promote adhesion.
I was thinking of doing the same thing, I just not sure if it is a good idea or not. [img]/images/graemlins/confused.gif[/img]

(Edit)
Come to think of it you can get some of the composite cores pre-laminated (with 18oz.glass), so I'm sure it would be alright.