Next I made the air inlet attachment from brass.

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Finally, the process I hate most, painting.

Cleaned the base and lightly sanded it.  Masked off some parts I decided not to paint and plugged the various holes with match sticks and paper.

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I then gave it an aluminium primer coat. 

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After the primer dried, I applied a cream coloured base coat.

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Left it to dry for 48 hours and then removed all the match sticks and tape covering the holes. I left the masking tape for the feet of the engine and also the air inlet.

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Masked all the base again.

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Patiently drew all the lines with a pencil. Next step is to cut out thin lines over the pencil lines.  I think this going to be the most critical part.

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The width of the lines was eyeballed.  It took a while to finish as I took a lot of coffee breaks. At least I did not make any boo-boos like cutting in the wrong place.

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A close-up of the completed cut lines.

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Sprayed it all in a white colour.

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Started the delicate process of removing the tape.

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Managed to remove all the tape without incident.  It turned out okay.

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And a close-up showing the flywheel well bolted up.

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Also finished up the plumbing in the base

Just final assembly to go.

Drawings here

Part 24 here  Part   here