Lwerewolf Posted December 15, 2019 Share Posted December 15, 2019 Hello! Gloss coat is exhibiting a weird "degradation pattern" on the car after about a month and a half - beading/sheeting is pretty much gone on the hood (towards the windshield and the center - sides and front where there's the most debris are way better) and on the roof... the upper part of the rear rocker is slightly more degraded as well, but the sides/rear of the car bead/sheet fine 🙄 Here's the story so far: Car is a MY09 (September 2008 manufacturing date) lexus gs450h, sillver metallic (paint code 1f2). Gloss coat was applied initially around the 15th of September this year, the following way: Snow foam pre-wash carpro reset pressure washer rinse iron remover, quick clay ONR wash (with BRS) polish (DA + orange opti pad + hyper polish - wanted to clean, a couple of RIDS on the car don't matter - silver metallic, after all + it had been fully corrected a year earlier with meg's twins, then protected with two coats of fk1000p + sonax BSD for maintenance... the few RIDS were mostly on the hood due to weird attempts ) ONR wash again (with BRS) dry coat of paint prep on the whole car gloss coat, light paint prep pray on each panel a bit (1-2min) before application, 4CCs used in total (without front bumper and mirrors), wipe away was 10 minutes post application (waffle weave towel), high spots weren't visible except on the hood, the "oil slick" was only visible under certain angles... silver metallic car, I guess - can't see other waxes too much either opti seal after an hour or two 3 weeks later, carpro reset + onr + dry + hyperseal (after drying, using the opti-seal applicator - I keep all applicators in a bucket full of ONR so hopefully no cross-contamination). This was all done outside, 20deg. Celsius temperatures during daylight. Coating was applied in the morning, and I accidentally left a few high spots at the center of the hood - accidentally squeezed the ONR needle, thought I wiped everything down but the center of the hood was properly "dotted". Come October and all the rain, I noticed that the water behavior was severely degraded. I read around, got power clean & MDR, threw everything that I could on the car (OPC@3:1, MDR left to soak, snow foam, reset, IPA, Meg's d101 (probably not a good idea), carpro eraser, , all these multiple times and in different order while checking for water behaviour in between with a pressure washer) and the results didn't change - the notable parts were that the paint lost water behaviour the most where the sun was shining at it directly in the morning. Since I had used a topper (hyper seal) and non-opti products (carpro reset - even though it should not be a concern from all that I've read so far), I decided to recoat (around the 25th of October, apparently) after doing just about all of the above again, minus the polishing - I only polished the high spots off the hood (which took some time - the gloss coat was still there, despite the flat water behaviour), used a heavy does of ONR + a synthetic wash mitt to clay the rest of the car, which didn't really take anything off. This was at the end of October. Since the we've had a lot of rain and some snow, and the washing routine was limited to pressure washing and ONR + BRS only. At any rate, today I decided to decon since the car wasn't beading well at all - MDR agitated with a microfiber, rinsed with ONR after 10-20 minutes (did the whole car then started wiping the same way - probably 20), dilluted OPC at 3:1, sprayed all over the car (this initially killed water behaviour), wiped down with ONR again - the sides and back of the car sheet decently well, but the hood and roof are... mostly gone. I'd say that the most level parts of them are the worst affected - towards the middle of the car. Funnily enough, the boot is fine. The sides and rear recovered pretty well after decontaminating - as in, they still sheet. Nothing like BSD or anything along the lines, but from what I've read, coatings in general don't really do that without some form of topper. Tried a coin-op wash as well ("shampoo" + thorough rinse), just in case - no difference, other than the roof getting accidentally sprayed with their "wax" thing, which I'm guessing will wear off in no time. At any rate, any ideas as to what could be going wrong? I'm wondering whether it can be sun exposure, or the opti-seal application after the gloss coat application being left on the car, or something along the lines... I've never had these parts of the car lose their beading/sheeting so quickly - 2 months of winter driving with no reapplication of anything to the hood & top (BSD on the sides) did almost no damage. All glass has been coated with GTechniq G1 since summer last year, and it doesn't appear to have degraded, but glass is way harder than paint, so there's that... I don't know what to think. Quote Link to comment Share on other sites More sharing options...
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