Post #1174508
2026-04-14 01:00 UTC
Replies (5)
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@debcha@saturation.social 2026-04-14 01:08
@mwichary Do you mean deterioration of paint generally, or those specific brush-like patterns?
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@colinstu@birdbutt.com 2026-04-14 01:10
@mwichary I'd just assume/guess poor adhesion due to poor or no prep work / priming. The parts that did not stick as well, wear away easier/quicker, leaving behind what did adhere. If it's something else I'd love to hear. Another idea: a reaction between different kinds of paints (oil vs latex or whatever). This kinda falls under poor/wrong prep though. I've seen reactions like that between paints, poor adhesion, etc.
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@debcha@saturation.social 2026-04-14 01:16
@mwichary I think the most important contributor is probably light (ie photolysis) — red tends to be particularly sensitive to this so probably not a coincidence that three of your examples are red paint — but other contributors to weathering might include water, air (ie ozone), expansion/contraction with temperature (which is likely different for the paint and the substrate) etc. [This is a generally informed expert opinion, but I’m not a conservator or anything.]
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@debcha@saturation.social 2026-04-14 01:21
@mwichary [I think it’s probable that municipal signage/professional sign painters would have appropriately primed and prepped surfaces for good paint adhesion, but time and high-energy photons come for us all]
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@Chancerubbage@mastodon.social 2026-04-14 03:28
@mwichary Paint or touch ups weren’t always UV resistant. Weather tends to weather everything . The paints binders breakdown it becomes like powder.