Subject: Re: M45 Tourer Screen Frame Advice
I've found vinegar is pretty good at dissolving rust, even heavy deposits. Leave immersed a couple of days, check, and repeat as necessary. Some provisos. Firstly, the vinegar will attack plating if it is poor, or in poor condition. As the metals are dissimilar, there is a possibility of electrolytic action. Due to guests staying I overlooked checking a copper brake pipe with wound steel wire protective covering. After 5 days, the steel had disappeared ... Hmmm, that could be a result for you...
Laurence