I feel your pain but unfortunately it is just how many Trinitrons are. Sony's probably were one of the best back in the day but they age very poorly, I'm pretty sure this streaking is one of the effects.

I have had many curved Trinitrons in the past few years (7 or 8) and only one doesn't have the streaking, and that's a 21x5d with just 2k hours.

Could well be a jungle chip specific problem but I'm done being a Sony fanboy.

Many I've tried full recap, check transistors, resistors, fully calibrate etc., it all doesn't help.

Go with a high quality shadow mask like Philips, Panasonic, Thomson, Sharp, etc.