CB-25J Mitchell

Started by George R Blair Jr · 230 · 1 year ago · 1/48, B-25J Mitchell, CB-25J, MATS, Monogram
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    George R Blair Jr said 1 year, 7 months ago:

    Thanks, Spiros (@fiveten). This is the first time I have used a clear color to tint a canopy. More work to do on the pilot's canopy.

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    Walt said 1 year, 7 months ago:

    George, @gblair, nice trick with the divider I will rember that. For green glass I use future. I take some put it in a mixing cup and add food color to it. Mix it to the color depth you want and you can either spray it on or dip it. In this case you can spray it on the canopy, it dries pretty quick and you can add light layers till you get the depth of color you want on the canopy. Cleans up nicely with Windex (ammonia version).

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    George R Blair Jr said 1 year, 7 months ago:

    Thanks, Walt (@luftwaffe-birdman). I have used Future and food color before, but I got pulled in by the Tamiya. It went on to the tail gunner's glass perfectly, so I didn't anticipate any problems with the pilot's canopy. The problem with the pilot's glass is that it has some aggressive curves. The thinned Tamiya I used on the tail tended to pool on the low side of the pilot's glass. I finally got it to work. The was the fact that you can clean it up using alcohol. So, I used one brush stroke using full-strength clear green without worrying about going outside the lines. I can clean up the glass later with some alcohol.

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    George R Blair Jr said 1 year, 7 months ago:

    Things have really slowed down again as I hit some unexpected problems. The first problem was tinting the eyebrow window over the pilots a transparent green. I used Tamiya Clear Green on the glass over the tail gunner, which came out perfect. It didn't work so well on the eyebrow window. This portion of the canopy is very curved, and the clear green wanted to pool instead of giving a consistent green. I tried thinning the green with either alcohol or water, both of which made the problem worse. Duh! I finally was able to get a consistent green by using full strength Tamiya Clear Green and constantly turning the canopy to prevent pooling. As it dried, it formed some light spots which I fixed by dabbing some more clear green in the area. I eventually got a consistent green, but it was too dark. I removed the clear green by soaking the canopy in alcohol. I discovered I could get consistent results if I mixed Tamiya Clear Green with Tamiya Clear Gloss. I got a green canopy with consistent color, so I decided to quit while I was ahead.

    My second problem is with the nose section. The bottom section is added separately from the fuselage, and I discovered that it was pinched in at the top. There is a flange where it attaches to the fuselage that forced the plastic to the correct shape. I assumed (you know what they say about assuming) that the front of the plastic would also be forced into the correct shape. When I checked the nose glass, I discovered that the rear of the glass fit perfectly, but the forward section was still pinched in a couple of millimeters. No amount of putty will fix this. I cut a small length of brass rod to force the forward part of the compartment to the correct width. I then glued the canopy to the nose compartment. I am hoping I can remove the rod and have the glass keep the width correct, but I am not holding my breath. I am prepared to camouflage the brass rod with paint and leave it in the nose. Not a great solution, but it will work.

    Tomorrow will consist of gluing the rest of the canopies in place and letting them dry. I always let canopies dry for 24 hours before I add the masking. In the meantime, I am making some painting decisions. Cheers.

    8 attached images. Click to enlarge.

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    Spiros Pendedekas said 1 year, 7 months ago:

    Superb progress despite your mini adventures, my friend @gblair! Great approach on the transparencies' tinting and I loved the brass rod! Let's see if the structure will hold itself upon its removal.
    Looking forward to your progress!

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    George R Blair Jr said 1 year, 7 months ago:

    More fun at every turn, Spiros (@fiveten). I would love to glue the nose glass on to reinforce things, but then I couldn't get the brass rod out. Hmmm...

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    John vd Biggelaar said 1 year, 7 months ago:

    You're getting closer and closer to a perfect transparency green, George @gblair
    Great idea on using the black marker, will give that trick a try myself.

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    George R Blair Jr said 1 year, 7 months ago:

    Thanks, John (@johnb). Slowly lurching to the finish.

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    Walt said 1 year, 7 months ago:

    George, @johnb, it seems like the Green Gremlin is fighting you on these canopies,


    or was it this one,

    but I think you finally got her licked...and definitely looks better than either of them.

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    George R Blair Jr said 1 year, 7 months ago:

    I actually had a green gremlin back in the day, Walt (@luftwaffe-birdman). Big mistake. But I think the canopy is under control now.

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    George R Blair Jr said 1 year, 7 months ago:

    Starting to clean up loose ends today. I got the two holes in the nose glass for the machine guns filled, so it is almost ready to go. Added the seats to the cockpit. I added one more layer of clear green to the eyebrow window, and I am pretty happy with it. There is some trim on the tail, and the front part of the nacelles, that will be painted either green or blue. These colors are usually associated with different squadrons. I chose green and sprayed it in the appropriate areas. I am not really happy with it, so I may strip it and try again. More tomorrow. Cheers everyone.

    5 attached images. Click to enlarge.

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    Spiros Pendedekas said 1 year, 7 months ago:

    Great overall progress, my friend @gblair! The tinted glass looks excellent!

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    John vd Biggelaar said 1 year, 7 months ago:

    The green eyebrow looks very nice this way, George @gblair.

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    George R Blair Jr said 1 year, 7 months ago:

    Thanks, Spiros (@fiveten) and John (@johnb). Glass going on today, and painting started. Yeah!

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    George R Blair Jr said 1 year, 7 months ago:

    I finally think I am really close to being able to start painting. I added all of the glass today and filled everything with putty. I think one of the greatest inventions in recent time is acrylic putty. You put it on, let it dry, then smooth it out using either alcohol or water. No sanding, no marks. I add dark green paint to the putty before I smooth it on the plane and I don't have to worry about white putty showing inside the the canopy. I use two different kinds: Vallejo Putty, which is relatively thin, and Perfect Plastic Putty by Deluxe Materials, which is a relatively thick, with a consistency like butter. PPP will hold its shape while it dries, so you can use it to fill and smooth rather large areas. I finished the day by going over the plane with very fine sandpaper to smooth things out, then everything was cleaned up using a paper towel dipped in alcohol. Tomorrow I hope to get the canopies masked and some painting started. Cheers everyone.

    10 attached images. Click to enlarge.