SURE!!! I'd love to see pics of your build as well... Before the great TRF crash of 08 (or whenever it was) there was a terrific dozen or more page thread about the Zooch shuttle... one stop shopping as it were of everything you wanted to know about the Zooch shuttle, everyone just adding their tips/tricks and pitfalls or questions on that one thread, adding pics of their builds or flights, talking about tweaks and stuff... it's still in the archives but it's display only now... Wes and I tried to resurrect it with my shuttle build thread over here in the "new" TRF post-crash, but nobody seems to have wanted to pick up the thread and run with it anymore like the old one... Heck I've even hoped that the beta-build threads I do with Wes's permission as I complete a beta build of a new kit for him will turn into a 'clearinghouse' for most info/questions about the kit in that particular thread, though it hasn't seemed to happen yet...
So yeah, I'm glad that you're posting questions here... and I know Wes follows things on the forums as he has the time, and it's easier for him I'm sure to have all the questions being asked in one thread instead of a half dozen different ones...
Ok, when I painted the roll pattern stripes on the RP-1 tank on the S-IC, I pretty much did it per the instructions... the overall rocket tubes get painted (flat) white, and then put the wraps on as indicated, and then I just used regular blue masking tape to mask off the edges of the stripes on the smooth part of the RP-1 tank wall (between the bottom wrap and the intertank wrap above the RP-1 tank). I painted the stripes with regular Testor's flat black paint (the tiny jars for plastic cars) with a camel-hair brush. (or whatever it is they use on the "20 brushes for $5" packs at Hobby Lobby...) I then peeled off the masking tape to leave smooth lines connecting the printed part of the wraps on the lower section (the thrust structure below the RP-1 tank, adjacent and between the engine/fin fairings). I didn't paint the wraps, so there's a slight texture change (and the color is a bit darker on the Testors paint than the ink in the printed wraps, but it looks okay to me... certainly unnoticeable from 10 feet away!)
I don't think putting masking tape on the wraps is a good idea... the wraps are cardstock, and it's quite possible for the paper to delaminate from itself (layers to peel off the lower layers) or to peel the ink off the paper or something bad.
If you have Tamiya masking tape, I'd just use that to lay out the stripe edges on the RP-1 tank between the thrust structure wrap and the intertank wrap, and paint up to the edges of both wraps with flat black Testor's paint and a brush. I certainly wouldn't mess with trying to mask EVERYTHING off and spray paint it... not at this scale!
Good luck and post pics and any other questions you might have! I'd love to see your work! The more the merrier!
OL JR