I totally agree with you that the lack of details on the denaturing agent can be a concern. It is very important to be aware of the specific chemical used to denature the alcohol, as it can pose different risks and require different precautions. Additionally, residue issues can arise depending...
I have used denatured alcohol and 90% isopropyl both for boat repair prep work and other small repairs. According to my using 90% isopropyl alcohol works well for cleaning various surfaces, including composites and Royalex/T-forms, without any adverse effects. But a cautious I want to say that...