Cripes! I wouldnt use carb cleaner,much less brake cleaner, to clean before welding even if somebody paid me,the minute I read "carb cleaner" and welding something sounded bad. Ive done some welding but would use regular solvent and then excessive amounts of air hose blasting along with drying time/low heat.
Phosgene gas,damn lucky to live through breathing one small puff of it,jeeez louize,be careful out there.
Some bikes around at times