Sadly I don't think so, because the blue *always* ends before the red and green. It is because the blue phosphor is the least durable of the three.
You clould check with that guy, Curt in the US. Either you would be buying a new 'blue tube', or sending your old one in for restoring. Either way it is a couple of $$$.
Personally, if I would have a CRT projector, I would buy three completely new tubes. Red, green and blue. Because the use of the projector / games in private will never ever become as intensive as in public environment. They'd last me my life time after the change.
And, you would set the contrast/brightness level to optimal, instead of as in the arcades on maximal.
To really maintain, or at least be confidant that your projectors get a good care from you, check with
http://www.curtpalme.com/CRTforSale_Misc.shtm This is how a CRT for your projector usually wears out.
http://www.curtpalme.com/TubeCondition.shtm.. also, I'm trying to find out if there's a 'sweet spot' where to keep the intensity output, to maintain the CRTs health as long as possible with a minimal compromise in the picture brightness.
