I also do tests on the underside of the machine or a cover, etc. just to make sure I am close. 

You have to keep track of your mix ratio...as once your test sample is dry...so is the paint you mixed up earlier.

Mikeytap,

One cannot go wrong with a nice SM3.  My grey one was the first machine I bought when I decided going back to typewriters after not using them since about 1979 or so.

I keep trying to win a nice green SM3 on SGW on-the-cheap...but those crazy bidders keep running the bids up past my "go no further" limits.

I thought a green SM3 along side my SG1 would be nice to have.  Or maybe a green SM4 as an alternative.
 

Today's machine is my 1964 Facit TP1 portable.  This is the later variety when the previous clear plastic paper tray changed to painted metal and with the Facit lettered-emblem in its centered placement.

With six Facit (and/or Addo) machines in our home, I am a big fan of the 1960-1970's machines.  Nothing moves quite like the slippery carriage tube & bearing system as on these Facits.

My TP1 case was in very good condition, but the white upper and lower panels were stained with rust and some chemicals, etc. and did not clean up.  So I gave them a light satin paint spray to match the original white color.
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Up on the desk for tomorrow's work.

1959 Consul model 1511.  It was a SGW machine and only 1 other bidder jumped in.  Got it for $ 60 or so, total.  Made in Czechoslovakia.

It just needed a deep cleaning, lighting oiling, and a new ribbon.

It is a fast and snappy typewriter.  If my Olympias and Facits are my A-students, this one certainly comes up to the B-student grouping.

The case was worn, torn in some places and the handle needed help.   So I patched and painted the case in a 2-tone colour scheme and used a replacement handle usually sold for guitar case replacements.
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I like the simple shape and rounded design of that cold war Consul, and the prominent simple logo. Definitely occupies a unique space in your collection. Looks heavy!