Pre-treating TPU ski end?

Hello,

when searching for TPU almost all results are for topsheets. Now, I bought some ski ends made from TPU:

https://www.skibaumarkt.de/produkt/skiende-245-mm/

Skibaumarkt recommends Sanding them before laminating. I wonder if some treatment like flaming (used for ABS sidewalls) helps bonding when laminating?

Thanks & best regards

Philipp