Prowannab
Poster putty is exactly that, common cheap sticky putty that I buy at walmart in the pencils and pens aisle that you stick posters up with. I keep a big blob of this stuff on my desk, both build boxes, both paint boxes, my trays and on my computer at all times. I use it to stick model parts to bamboo skewers to paint, lay it on as a soft mask for camo and honestly I keep coming up with uses for it (like plugging holes in the bottom of some planes before painting, sticking weight into vinyl figures, putting resin figures together to figure out how they will fit, etc etc etc.)
It comes in colors and price ranges....you should be paying around a dollar to a dollar and a half for this stuff. The color I have right now in front of me is yellow HandiTAK from wally world, but I find the white stuff seems to work a bit better. I have also used some blue stuff that is also sold in the hobby shops for more money, that is called BluTak. Anyway , when you get the stuff , stretch it out and really knead it immediatly before use. It will get warm and stickier by doing this. Dont apply over Tamiya paint, it WILL eat it! You can roll it into a worm and apply it where you want soft edge camo to go: keep your paint spray perfectly perpendicular to the surface and keep your pressure low. This is an old masking technique and works well if done correctly.
Otherwise experiment and play with it. It does eventually become contaminiated but you will be very surprised that once you overspray with whatever color paint, and you reclaim it and knead it again, all that paint color seems to just "dissappear"!
This should help, it's my Kempfer stuck to skewers ready to paint with each piece held on with poster putty.
David
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Build to please yourself, and don't worry about what others think!
TI 4019 Jolly Roger Squadron, 501st Legion