Hi Derek I cant see your pic due to some image hosting sites being blocked at work.
But i think they do have a shelf life, but very long.
What seems to be the issue? orange peel, fish eyes, bleeds, dull or all the above
Well heres my method of spraying, I am not the best but i get pretty good finishes so i think im eligible to give advice
step 1- clean the body/surface of any dust particle.
step 2- Give the body a nice sanding, i use a 1500 grit/2000 grit s/paper and give it a nice sanding. This will take out any flashing from moulds aswell as mould lines (if there is any) and also allow the primer to sit/stick even better.
step 3- spray primer from an approx distant of 25cm-30cm and give even strokes when spraying. First coat do not try and cover everything at once, so spray evenly across the whole body and i normally wait about a minute before applying teh next coat. Then apply the next coat of primer again evenly and smoothly. give about 3-4coats. Dont worry about orangle peel if any, dont try and cover it up bu spraying a thick wet coat. let this dry for about a day...to be safe
step 4- check for dust particles and orange peel or bleeds etc. If theres any then give it a light wet sanding and thsi will remove all blemishes. rinse off and dry thoroughly.
step 5- laying down colour, same as above smooth and even application. dont worry about it shining or not. all you want is a smoot and even colour. 3 coats again and leave for a day or two so it can bake. Sometimes spraying clear over soft paint will discolour the base coat. tamiya sprays need to be hard.
step 6- check for any imperfections and give a light sanding again, here i use micromesh clothes and use the 6000/8000 grit cloth to take off any imperfections and gives a smooth surface when laying down clear.
step 7- now this is where i use to struggle, up to this day (ten years of building models) i have to amped myself up before laying that first coat
. So shake well and take a deep breathe and lay down that clear. 2/3 mist coats at first ( 5 mins before each coat, i do 5 mins so i dont get any bleeds) and then i give 2 wet coats.
Now you still wont have a very shiny model, sometimes you lucky and most times not. Dont worry it will shine when you done. Leave your model for about 3-4 days and let that clear coat bake hard.
After third day it will be ready to "cut" the paint. Below is the steps i take to get the best results for me.
step 1- wash body/surface
step 2- fill bucket with water and use 4000 grit polishing cloth (micromesh). always make sure the surface is wet. Polish until you see the whole body go dull, be carefeul not to polish through to the base coat. once done with 4000 move onto 6000 and so forth ending with your finest cloth. i end with 12 000 grit.
step 3- now you will have an okay-ish shining model, i then use meguires car polishes (paint cleaner/wax & polish)
step 4 - now its starting to look like a mirror
, but it can look better. I then use Tamiya Finish and now enjoy your beautifully painted model.
If the above is what you do/did and your spray still looked like garbage...remember weather also plays a huge role in getting great finishes.
I always wait for a warm evening, i find at night theres less dust particles floating around and the paint seems to lay down better (i could be mad haha)
So this is my technique, everyone has there own ways but do find your sweet spot and build from there.
Also if anyone else would like to correct or add to my method feel free, excuse my spelling errors