Still off topic here, but this is what membrane is/does.
on topic: drtcmm: It can be various problems. If you injected the resin quickly, and air got trapped in those impressions, then there isn’t much you can do. Try to do it again, and when the resin gets near those areas, slightly clamp the resin line…let it slooooowly fill that area, and then open again to fill the rest. If those are the only areas that didn’t fill, you can also try filliing them first with resin, letting it gel, then doing the rest of the part. Or sand it down a bit, polish, and pretend it is only supposed to be a slightly raised area 
Or fill in with resin, and sand down again (depending on how deep the bubbles are)