Camo Tape

I used the Gorilla tape on my Prod

There is a camo wrap that doesn't leave glue behind if you want to take it off again.
I have used gorilla camo on a BP gun and it will last a long time but I would dread taking it off again

I recommend you find some that's removable. Duct tape leaves a nasty residue. Google camo wrap and that should get you started. I have seen the wrap in army surplus/outdoor stores.

I used the non glue type on my S-510. Left it there for about a year. When I took it off, there was no trace left behind. Good stuff! 
Tom

I like and use this stuff right here . From E-bay there are other patterns to choose from .
McNett Camo Form Wrap ACU Digital Self Cling Tape 

this stuff is great it's a little more money that some of the other stuff but it works great
and it is removable and reusable , it has the right amount of stickiness to it . 

Alcohol will remove tape residue. A nice cloth based neutral color works just fine. Ebay is your friend on this one.

The wrap that is non residue is basically the same material the clinics use to put a cotton ball on your arm after a shot. It sticks to itself and not the gun....
You might think about dipping instead, yes it's a more expensive option but when done right looks incredible and is surprisingly durable.
I have had a bow done and it stood up to a lot of battering 

When it comes to simplicity, nothing beats self-adhesive camo tape. It really doesn't "stick" like duct tape or vinyl shrink tapes, but it does stay put until you're ready to remove it. On Amazon, it is about $10 for three rolls, and plenty enough to do the average airgun. And it comes in different colors too!

https://www.amazon.com/Uning-Self-adhesive-Protective-Camouflage-Multi-functional/dp/B01JZL8TG6/ref=sr_1_4?ie=UTF8&qid=1496837008&sr=8-4&keywords=camo+tape

Try a company called GunSkin...you'll definitely like their patterns.

Trust me. I work for 3M. Use Mossy Oak camo kit