I stripped off ALL of our deck hardware a few months ago. Ericson used 5200 for everything. Yikes.
Tiresome work to "get under" the parts. I settled on several shiny ss scrapers in various widths, and the flexible ones work well.
Use a 2# short hammer to gently "thump" the blade handle. Take your time. As noted above it can help to put some good quality (metal surfaced) tape right up the base of the part. You will need multiple blades to work your way into and under all sides of the parts. Go slow, and steady. As you work the blade under, wiggle it from side to side, and the material will give way.
That said, we did have some small teak chips that were torn away from the base of some parts, but nothing that would not glue back.
Further, and no, you did not ask, but even will the tenacity of 5200, we found that a number of port light frames and deck pieces had evidence of moisture sneaking in under them
Almost to the point where it would have reached the coring if ignored another few years. So, even with a 'high end' boat, after 30 years it is
Time to rebed everything.
As a mechanic friend of mine likes to say regarding maintenance : "That's why it's called Preventative Maintenance!".
"Good luck Storming the Castle", as Miracle Max said with a grin !!