When you approach a convert. auto what is your detailing process? Because you are dealing with a fabric top there are steps you need to follow first vs dealing with paint. Do you wash the entire car, detail the top and then, do you cover the top before attacking the paint? You can drop the top or leave it up?
And then going forward on a weekly maintenance program, namely a rinseless wash, what do you do to the top to maintain, you can`t use the rinseless was on the top, or can you?
I have Detailed hundreds of convertibles in the Pacific Northwest that for some reason has more convertibles than a lot of places where the sun shines all the time.. They were mostly all German vehicles, Audi, BMW, Mercedes, Mini Cooper, and a few Jaguars, etc..
I will wash the car, starting with the convertible top using Ragg Top Convertible Top Cleaner soap and a soft brush, being very careful to not damage it if it is old and weak... Be very careful if the back window is clear plastic and do not scrub it with anything except a very soft cloth and lots of water and soap, so you do not accidently scratch it.. Same for the inside of it, be very careful cleaning it..
A lot of back windows are also glass, so that is always much easier to deal with..
Then, I wash the entire rest of the vehicle, the engine, compartment, etc., wheels, tires..
Then I come back to the top, rinse it all over again really good, and take out my Mytee HP60 Extractor and inject and remove all the water carefully off the entire top and the sides, etc., being really careful..
This process makes the top fabric stand up a little and of course, gets everything out of it, and it always looks even, and just beautiful.
I let it dry outside or if not possible, inside overnight, and the next morning, carefully spray RaggTop Conditioner over it using a long not too wide strip of cardboard to hold on all the edges of the top/glass, so none of the spray gets on these places... Use common sense, spray like you are Painting it...
When, dry, you might put another coat on it if you want, it always helps..
Up there in the rainy/snowing for 300+ days a year, PNW, these tops all weather it great, bead water like heck and are always easier to Detail the next time I see the vehicle..
I never need to cover the top with plastic when paint correcting the vehicle, because I use
slower speeds to spread out the product, and do
NOT let any product I`m using
DRY to the point of Dusting... Just dont do it..

Dan F