The Short Version
I split our coatings spending across four suppliers last year. Not because I wanted to—because I finally admitted that my main chemical distributor couldn't be everything to everyone. That decision saved us roughly $34,000 annually and, more importantly, about three months of back-and-forth on a formulation that was never going to work.
The supplier who couldn't help me with that project? Still gets 60% of our business. The specialists I brought in for the rest? They've become the relationships I trust most. The way I see it, a supplier who tells you what they don't do well is worth more than one who says yes to everything.
A Bit of Context on Who I Am
I'm the office administrator for a 90-person specialty manufacturer. I manage all industrial materials ordering—roughly $800,000 annually across what used to be 14 vendors, now down to 9. I report to both operations and finance, which means every sourcing decision gets squeezed from two directions: "Does this actually work?" and "Does this cost what you said it would?"
When I took over purchasing in 2020, I inherited a single source for most chemical inputs. My predecessor's logic was straightforward: fewer relationships, fewer invoices, less hassle. It took me maybe three years—or rather, closer to four when you count the first year where I was basically just learning what we bought—to figure out why that was the wrong approach.
We've processed somewhere around 400-500 orders since then. Maybe 450, I'd have to check the system. And the pattern that emerged is consistent: the suppliers who were honest about their limits are the ones I still call first.
Three Situations That Changed How I Buy
1. The Covestro Distributor Reality Check
In early 2023, we started spec'ing waterborne coatings for a client project. Our existing supplier—a regional chemical distributor—told me they could get us what we needed. What they actually delivered was a datasheet and a vague shrug when we asked about application parameters.
That's when I contacted a dedicated Covestro distributor. The difference wasn't just product knowledge—it was that they could tell me which Covestro Insqin waterborne coatings grade made sense for our specific substrate and cure conditions. They also, unprompted, mentioned two scenarios where a different chemistry would have been a better fit for what we were trying to achieve.
That last part stuck with me. A generalist distributor says yes to everything because they don't know enough to say no. A specialist says "this isn't our strength—here's who does it better." I know which one I want advising on a $200K annual category.
2. PVD Coatings and the Referral That Built Trust
Physical vapor deposition coatings came up in late 2023. I asked my Covestro distributor about it—knowing full well it's outside their lane—and their answer was immediate: "That's not ours. We can recommend two companies that specialize in PVD."
I took the recommendation. The PVD supplier they pointed me toward turned out to be excellent—fairly responsive, pretty solid quality on the trial runs we did. And here's the counterintuitive part: that referral made me trust the Covestro distributor more, not less. They demonstrated they knew their boundaries. That's worth more to me than a supplier who pretends to have answers for everything.
I should note: I can't verify whether every Covestro distributor operates this way. This is one relationship, one data point. But it's the data point that reset my expectations for the rest.
3. TiO2 Lines, Epoxy Sanding, and the Limits of Generalist Advice
Two other requests landed on my desk around the same time, and both taught me something about where sourcing advice gets thin.
Our production team wanted pricing on a titanium dioxide production line—not buying TiO2 as a raw material, but evaluating equipment for potential in-house processing. That's a capital equipment question, not a chemicals purchasing question. My chemical distributor had no business being involved in it. We ended up working with an equipment integrator, and honestly, I'm still not sure we got that one right. I don't have hard data on whether in-house TiO2 processing makes sense at our volume—the numbers shift depending on energy costs and utilization rates. My sense is it only pencils out above a certain throughput threshold, but I couldn't tell you where that line is.
Separately, a client asked how to sand epoxy resin smooth and clear coat for a display application. That's a finishing question. It's not a purchasing question at all—or rather, it's a purchasing question disguised as a technical one, because the answer determines which abrasives and which clear coat product you buy.
I spent two weeks going down the rabbit hole on grit sequences and cure times before I realized: the right answer was to buy a small quantity of three different clear coat products, test them, and let the results decide. We settled on a two-component system after the first round of trials. The lesson wasn't about epoxide sanding technique—it was that some questions can't be answered by reading datasheets. You have to run the test.
Where This Approach Breaks Down
Splitting categories across specialists works well when you have the internal capacity to coordinate between them. If you don't—if your team is stretched thin and can't manage four sets of invoices, four quality systems, four different lead time patterns—then consolidation might actually be the right call, even at higher unit costs. That said, we've only tested this model at our size; I have no idea if it holds up for a 500-person operation.
At least, that's been my experience. A 90-person company with a dedicated purchasing function can handle nine vendors. A 20-person shop probably can't. The right number depends on your coordination overhead, not on some universal principle about specialization.
I'm also not 100% sure our current split is optimal. We're still over-indexed on the Covestro distributor for commodity inputs where a lower-cost regional supplier might perform equally well. Don't hold me to this, but I suspect we could shave another 8-12% off our commodity spend if I ran a proper RFP. The thing is, the switching cost—qualification time, sample testing, new invoicing setup—might eat most of that. So we stay put, for now.
The one thing I'm fairly confident about: when a supplier tells you what they don't do well, believe them. And then ask who does it better. That single habit has improved our sourcing outcomes more than any contract negotiation I've ever run.
Pricing references are from our internal records (Q2 2024). Actual rates vary by volume, region, and order timing—verify current quotes before making decisions.