[Arran]

Sorry about assuming that you didn't use stripper, or acetone, you would be surprised how many people try stripping a piece of furniture the hard way, I have a Philco 620 cabinet where someone went at it with a sanding disk and ruined the moldings, as well as leaving swirl marks elsewhere. I would try applying some with a small brush and use a dental pick or small jewelers screwdriver to get it out of the crevices, somewhere along the way I ended up finding a spacial paint stripping tool at a yard sale and have been using that for finish removal, it has a number of profiles on it to remove paint or other finish from moldings and the like. In terms of what to use for grain filler you could try asking around at paint stores, otherwise you will have to improvise something such as plaster, or go the mail order route. 
Regards
Arran