So I just tried using sprue glue and primer and have a few questions. 

First about sprue glue, I mixed some runner bits and mr cement s and tried using it to seal some seam lines and I’m not sure what I’m doing wrong. The blue sprue glue was more viscous than the black sprue glue. In the first image, I just applied onto the seam lines and after sanding I can still see the seam lines, for the second image, I applied it in between the 2 pieces and held them together and then applied abit on top, I notice these weird white spots. For the last 2 images, I applied just in between the 2 pieces and held them together, but after sanding I still notice these white spots, which will go away after I sand more but the piece is getting deformed. I use a brush for the first 2 images and a toothpick for the last 2 images. What am I doing wrong? Why are these white spots appearing?

I also tried making a mixture of mr surfaces 1500 primer with mr leveling color thinner and didn’t realise the smell was so strong. Due to my current living conditions, I do not have a place to leave it in to dissipate the smell for a long period of time, at most maybe 7-8 hours. How long will this smell last and is there a way I can speed up the dissipation of this smell? I am already air ventilating it by placing it next to the windows which are wide opened and fan blowing it out.



Question about sprue glue and primer