and they just did. I am currently repainting the new old truck..and having scored a free job lot of 2 pack epoxy, plus thinners etc I was up for it. The short story. Lumps in paint, gun blocks up, lid off gravity gun flushing thinners through the blockage and it decides to burb a slug of thinners and paint residue back up INTO MY FACE. Luckily I closed my eyes in time and just caught it across the forehead and on the eyelids. Excruciating burning pain would the short version. Rapid panic that I had just blinded myself followed by huge relief that yes I could see the bottom of the sink as I washed my face and eyes for the next 20min.
It will be the quick unplanned job that will get you.
DTR