Scots pines can double flush when fed vigorously. Of the 150 I own, around 40 of them double flush. They don't backbud as easily with JBP techniques applied. But they can back bud on pretty old wood, and two scots pine cultivars (Norsk Typ; green foliage and Watereri; glaucous foliage) do it better and more consistently than JBP.
I see them as 'single and a half flush' pines.
With scots pine it's usually not that handy to cut back like a JBP and remove the entire shoot (note that I say shoot, not candle), but instead I like to leave a few pairs of needles (4-12 pairs). I do this after the needles have hardened off. This has led to consistent terminal bud formation; usually in pairs, sometimes 5 or more.
In stronger specimens, you could remove the new shoot entirely, but budding becomes inconsistent when that's practiced. If there are no old needles, the entire branch could just die - or bud all over the place. With cone structures acting like this, I'd say it's wiser to do so - cut the entire new shoot - and hope for the best. I've found that most scots pines like this sooner rather than later, when the candle has become a shoot and you leave them for a couple of weeks, and then cut back, they seem to bud closer to the trunk. This is before the shoots have hardened off, when the needles are still soft and can easily be pulled.
If there are buds lower down and the tree is healthy, cut away freely. They'll take it. And they'll probably pop out a small shoot before winter.
Pushing growth back on a scots pine reliably is hard, but they seem pretty resilient. I have more than a few needle-less stubs that pushed a few buds. When the wood is over 4 years old, it seems to get harder.
My scots pines were cut to 4-12 pairs around the end of june and they're almost done forming new apical buds. So it's late, but not too late.
Of course, I'm reasoning from my own climate; we're about 1,5 months away from the start of the autumn.
Please also note that my experience is limited to 3 years of experimentation. If other more experienced people chime in, listen to them.