If I had it to do over again I'd use the .005 thick acetate. The front cabinet stencil was a little sturdier and didn't curl up like the .003 did.

Again, probably because it was thin, the acetate had started to curl just sitting there for the last months before the painting. If possible, lay it flat and cover it with something like a playfield glass to keep it from curling until you are ready to paint. Mine was just sitting flat on a piece of cardboard with nothing on top.

Only use the spray mount adhesive if you have to.  You will likely wreck the stencil taking it off even though it is repositionable.  Keep some handy though, it saved me on the second blue side.

Definitely use nuts, rocks, or something to hold down areas that aren't touching the cabinet. I bought 4 boxes of 3/8" nuts (400) from Home Depot and used them all.

I wiped the cabinet down with a clean cloth very lightly and very quckly to try and build up some static so the acetate would cling better, and it seemed to help. Of course it's a lot drier in Arizona so I can get away with that, maybe that's not possible in a humid environment. Of course introducing static might make other things like dust stick prior to painting so use with caution.

Graphic description warning: Wear a painters or dust mask when painting. I didn't think I was inhaling all that much but lots of blue and red stuff coming out of my nose now when I blow. Yuck. Sorry for the graphic description.

Don't go too heavy with the paint. Go as light as possible. It helps blend in with the base color better, rather than a sharp visible edge.

Mask off every possible exposed area of the cabinet you don't want painted. Overspray goes everywhere.

Get a painters large drop cloth/plastics (about $2 at Home Depot) to put on the ground before painting. I painted in the garage (cars removed) so it kept the concrete from getting painted with overspray and reduced the dust around the area. Be careful stepping on it though, the overspray on it is sticky and wants to go with you when you try to walk.

Remove the stencil while the paint is still tacky. If you wait for it to dry the stencil might stick and then tear when you go to remove, or worse yet, take some of the cabinet paint with it.

Get someone to help you putting the stencil on and especially taking it off. The still-wet paint can stick to itself very easily.

Remove any overspray as soon as you can with a q-tip, thinner and very light pressure. Once dry it is a lot harder to take off and will usually take the under color along with it as you have to rub harder. When it's fresh it comes up very easily and doesn't affect the paint underneath (at least on mine). I think this is especially true for enamel-based paint... it's quite durable once dry.

Don't be stingy when masking off things you don't want painted. I thought I had done a good job but missed a couple areas.

Allow plenty of time for drying before handling.  Fingerprints in paint don't look good after they've dried.