I've been using Silly Putty (in the US) for years to mask camo schemes on tanks and planes. It can leave greasy marks on the undercoat, but gloss coating a kit will prevent that. It's benefits are that it's stable and reusable, and it'll hold shape forever.

I decided to try out AK's Panzer Putty as it's supposed to be very similar, without needing the gloss coat. Nifty! Initial feel was that it was waxier, probably why it wouldn't leave the grease marks.

I masked out my PzH 2000 for the second NATO color two days ago, and was going to spray the second color today. What I found was this mess. Apparently Panzer Putty is not as stable as Silly Putty, as it continues to flow, albeit slowly.

My camo pattern was ruined as the putty had "puddled" wider, and worst of all, it had flowed under many of the finer details to removing it ended up pulling up many of the etch bits and finer tools on the surface. It had dripped down on my desk as can be seen on the photos, there was even a puddle on the floor.

I'm going to guess that it could be usable if you can mask and then paint immediately afterwards? That's not going to work for my purposes due to hobby time constraints so this stuff won't get used again. Just a cautionary tale for others.

3 attached images. Click to enlarge.

yep, i hear more and more complaints about AK products.

I am a true believer in good old Revell enamels. I mix them myself based on photographic reference so I can't say I have all the colors in their range. By coincidence, I wrote about the same issue in my WiP post just yesterday:
https://imodeler.com/groups/military-vehicles-modern/forum/topic/t-72b-variant-in-syria-in-135/

I just refuse to buy in these expensive paints, they cost about 2.80 EUR per 17 ml, that is 165 EUR/liter, which is the equivalent of buying a barrel of crude oil WTI at 26.353 EUR per barrel (1 bbl = 160 liters that was before oil prices went negative recently on the front-month futures May-2020 contract). This is insane!

If you ever wondered why paints were marketing so heavily in journals and on modeling sites, now you know: You can make more money on them than on kits while you can mix them in your own shed underneath the willow-tree!

Me too! Bought the Panzer putty intended to use it for my Aviocar camouflage some time ago but not use it so far. Good heads up! As a side note, I agree with Michael about the ever growing ranges of paints out there, clearly a very profitable market. However, not all products from AK are bad, take for instance the Real Colors, been using them and it’s a very nice product.