Sorry, I couldn't think of a more appropriate thread title...
I've not painted anything properly for ages, I had high hopes for this but I think I tried to do too much and in the end couldn't do some of it which was hugely frustrating but at least I've found limits early on. I tried to do the pin line super thin, 1mm, with a 0.5 mm inside line and shading. I'd put the mask on too thick and not cut hard enough so both pin lines came off at once. So next time I'll know more of what is going to be possible... well that's the theory anyway.
This shell was purposely simple as it's for a photo shoot, therefore no fancy colours or shading or even details to detract from the actual product. It's a shame I couldn't get the pin lines more exact but it's my first one in ages and the next one will be better !