allright everyone i've just re skimmed my mums dining room with my brother and i noticed on one of my walls about half way up i noticed some really small lumps maybe small air bubbles but notactually bubbles if ya know what i mean, can anyone tell me what they might be or why they are there,the wall was smooth to start with so its nothing under the new skim and i used a low speed drill to mix the plaster

blisters may be. If run your trowel over them the following day, while the plaster is still dark they will push in.

2 good coats of pva will stop this problem

could be where the plaster wasn't mixed enough.