Not strictly applicable to the "interior primer only" question, but I took a few moments to look up the PPG technical email I spoke of in a previous post. My particular interest was basecoat/clearcoat exterior finishing. Should be helpful to someone. Note choice #6; nothing under the DPLF. Also see the note about DPX171 and DPLF.
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Dear Dan:
Thank you for your interest in PPG Refinish products. Aluminum may be refinished by one of the following Deltron combinations:
1. Etch primer DX1791, DPLF Epoxy, DBC, Deltron Clearcoat of choice
2. Etch primer DX1791, DPS3055, DAS3025, DBC, Deltron Clearcoat of choice
3. Etch primer DPX171, DPS3055, DAS3025, DBC, Deltron Clearcoat of choice
4. DX533, DX503, DPLF Epoxy, DBC, Deltron Clearcoat of choice
5. DX533, DX503, DPLF Epoxy, DPS3055, DAS3025, DBC, Deltron Clearcoat of choice
6. DPLF Epoxy(2 coats) DAS3055, DBC, Deltron Clearcoat of choice
These are just some of the combinations. All told there are probably another 10 more. A lot would depend on whether or not sanding is necessary (DPS3055, K36, K38 all require sanding...). The most common combination involves DPLF Epoxy somewhere in the mix. Options 1 and 4 are the most common. The rest is up to you.
A few things to keep in mind:
1. You CAN NOT apply DPLF Epoxy over DPX171 Etch primer. The only Etch products that may go under DPLF are the DX1791 Etch primer, and the DX503 Aluminum Conditioner.
2 If you decide to use the Metal Treatments (DX533 & DX503), you can not use any other kind of Etch primer as well (DX1791, DPX171)
3. DCC Concept Acrylic Urethane Single Stage may be used in place of DBC basecoat if you decide not to clearcoat.
If further assistance is required, please contact us at the Technical Service number listed below or visit our website at
www.ppgrefinish.com.
PPG Technical Service office is open Monday - Friday, 8:00-6:00 EST. This office can be reached at 800-647-6050 or FAX 440-572-6772. The E-mail address is -
[email protected]