We had 3 cars with considerably different usage patterns; all protected with same set of products (Kamikaze Miyabi x 2, ISM 1.0 x 1) – (October 2016 thru May 2019)
Car 1 would have likely got to 5 years before needing to be completely redone. (Applied October 2016, re-done June 2019 for different coating curiosity, original coating at 85% ‘as applied’ when re-done)
Car 2 will likely never need to be redone. (Sold January 2019, coating at 90% as applied in 08/2017)
Car 3 got to nearly 2 years before needing to be redone. (applied September 2017, re-done in May 2019 @42k miles; still OK on hood, roof and trunk lid but toast on sides)
Car 1 is about 5500 miles a year, no freeway, sat outside 24/7, 365 during that period but only really driven daily November thru April, short trips, no freeway.
Car 2 was daily driver in nice weather, April thru November, usually no-rain days only, always garaged, 5500 miles a year, rarely freeway.
Car 3 is year round daily driver, generally was always garaged during 2/3 of that period, 25k miles a year, 95% freeway.
All are in NE Ohio which really goes heavy and early with road treatments in Winter:
https://budgetplan1.files.wordpress....treatments.pdf
I have Miyabi x 2 + ISM 2.0 x 1 on my daily driver now (except for hood, roof and trunk lid) but only about a year in with that combo. Made it through Winter very nicely but still too soon to tell if the ISM 2.0 will do better than ISM 1.0 (on top of Miyabi). ISM 2.0 is a bit of a PITA to apply as well…apply in small section, remove IMMEDIATELY. A bit more of a candy-gloss than ISM 1.0, I kinda dig it but until another year passes, I’m not willing to say it’s ‘better’ than ISM 1.0.
Also have ISM 2.0 as a single layer on a fleet van at work, more info here (detail):
https://budgetplan1.wordpress.com/gl...oatings/#ISM20
Edit: FWIW Our daily drivers don`t get washed much during the November - April months. Maybe an occasional nice day hits and they got bucket washed but aside from that, a monthly trip through the local touchless soap/rinse tunnel is about as good as it gets for me. Hit `em in the Spring with a heavy foam, Gyeon Iron, Gyeon Tar and the coatings came back (until they didn`t). Car #1 cleaned up nicely each Spring in its 3rd Spring with a simple spraydown with Polish Angel Ultrared.
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