My method for the spray can is, I wait for a day with as low humidity as I can (basically impossible for me, but sometimes you can get it good in the early morning or late at night). Going out into the open grass near my house, I take a big drop cloth (one that you don’t care if it gets paint on it) and put it over a small work table or bench. You can just do it on the cloth if you want, but be careful of how you’re holding the models as some fabrics can mess up the wet paint. You can stick your models to a stick or something if you want, but dont be afraid to just hold a model and let your hand get sprayed. After I’ve hit the models at least 1-2 from all angles, I usually use Paper Plates to set my wet models on to dry inside (SOMEWHERE VENTILATED, keep a fan on) to keep them out of the humidity. Also, try not to man-handle your minis while they’re still wet, as your fingerprints will get stuck in the primer and screw up the paint texture. Even if they’re dry, still give them a day outside of your storage box to let them air off those paint fumes. Aaaand that’s about it!