I’m working through this and spending WAY too much time on it and so cut and run with the chrome on the Harley. I messed up the paper a few times by mis-counting the grid lines and erasing the upper left side, then realized I had counted right and erased that and the lower bit of it, and repeated the mistake near the end when I was at the bottom right with the footrest. So, I didn’t push it too far since it wouldn’t hold more. I resorted to the Mars Lumograph Black 8B matte black pencils from Staedtler and they got me a bit more value over regular 8B lead from a lead holder. The varying grades of black are mostly 2B to 8B and then the black 8B and it is pretty obvious where that was used.
I am still starting and not very good at this. I could do more on the chrome of the Harley and actually get the pedal chrome correct but have over 15 hours into it, and halfway through realized the page was sitting 4 pages away from a 5x7" grey paper I taped into the sketchbook so there’s a ridge all the way around where the pencil caught and made extra dark digging into paper uneraseable lines, in addition to far too pressured 4H pencil for the grid lines which I re-did twice and then still mis-counted twice, so there’s only about 10 hours of actual stuff if I don’t count erasing and 20 hours of fretting over it.
Every time I’d touch something up, I’d see it didn’t match and really REALLY got lost on the exhaust pipe and the foot rest, drawing from memory of in person rather than what I was seeing in the photo. I’m not ready for the jellyfish yet, I need to practice something simpler. I’m including the shoe since I feel I improved a little bit at least.
Feedback welcome on how to somehow work by grid, while keeping entire image in mind and not letting what you think you know the lines should be not matching the grid lines, and then how to double and triple check grid lines so you don’t get them knocked off by 1/4" in a re-draw, needing another re-draw of what was erased. So… Frustration and couldn’t do the “70 little pictures” method, I was going more object by object while using grid as reference to how they fit together and ended up with something that doesn’t look right from either viewpoint on the chrome.
The Chrome Harley is also the largest drawing I’ve made yet. The shoe was only 6" wide or so, while the Chrome was 7" x 10", I’m used to 4x6 to 5x7 max from colored pencil patience issues smearing habits into other media.
like, even the warning label is legible…wow! Advice-wise, I think that if you WANT to work object by object, and FIND that method works for you, that’s perfectly fine. Grid is just one way of approaching a drawing, and it might not be the go-to option for everyone. One approach I use when sketching is laying out the base shapes of the objects. So, it’s serving as a placeholder/template because it’s “blocking out” the shapes. Hope that helps, love your work! 
