What are the weapons magnetization prospects for the minis inside the Know No Fear boxes given the latest WH40K edition and modern kits and their weapons options ?

What are the weapons magnetization prospects for the minis inside the Know No Fear boxes given the modern game and modern kits and their weapons options ?

I'm restarting my Ultramarines army which I only have circa 380 points worth of fully painted and today up in the attic I discovered TWO (untouched) boxes of the Know No Fear 8th edition miniatures boxes.

I didn't retrieve the boxes as they were under a big stack of boxes but watching videos and looking at the sprues they don't ''seem' too bad for magnetizing the weapons (I am a big magnetizer and WYSIWYG weapons load out guy).

My question to you all is: For the minis in the KNOW NO FEAR box for both Ultramarines (the Intercessor, Hellblasters, Inceptors, and Captain) and also for the Deathguard (Lord of Contagion,Plague Marines, Foetid Bloat Drone, Poxwalkers), is it POSSIBLE to magnetize the weapons on them and swap them out for weapons in the existing kits you can buy separately for 10th edition WH40K ?

Or am I embarking on a futile exercise and should sell them all as magnetization is just not viable ?

Thanks in advance for your opinions on this.

https://preview.redd.it/t83ntdmdntng1.jpg?width=920&format=pjpg&auto=webp&s=7d9ee3396d96e11f7a126493a4310e618ce1f7d0