Generally 'pillar' bedding is a bolt action rifle thing.. It simply means installing sleeves or pillars of material around the screws which retain the bottom metal and the receiver together. The pillars are usually aluminum and the technique was developed originally to keep a well bedded and accurate rifle from 'going sour' as they say. This was usually due to compression of the wood between the action and the bottom metal by the constant pressure of the action screws. Of late its' come to be seen as an accurrizing process but that would more properly be called bedding. Bedding the forearm on a single shot rifle is usually the first path to better groups. I've not a lot of experience with the Encore but would bed it solidly then test fire and see if the rifle is happy! If not a spacer can be installed between the barrel and fore arm in the inlet.. This effectively free floats the barrel.. The little dust bumps are likely as you said bits of dust in the finish. Very lightly rub the stock with 0000 (4 '0' grade) steel wool. This should JUST remove the bumps, nothing more. Then depending on whether you want a gloss finish or a satin either apply a wet coat of Lin-Speed and protect from airborne dust or just wax with a fine grade of carnuba bearing wax. Dust in the air is the bane of finishes..