Join Date: Jun 1999
Location: Rochester, MN USA
MikeDF80 If you are using PPG products use etching primer "DX 1791 & DX 1792" they are mixed 1 to 1. You can also add up to 10% of DT reducer to slow it down alittle (so it doesn't spray dry). You only need one light coat. According to my PPG rep this is the best performing metal etch PPG makes. I like to spray on DP about a half an hour after the metal etch just to seal it off. I then let it dry and in a day or two begin my body work. When done with body work I reapply metal etch to any bare metal areas and prime with a high quality primer. Metal etch has no filling quality it only helps prevent rust from accuring, so primer is needed over any body work that is performed.
cardude I only used DP LF a few times before we switched to PPG global which uses differant sealers, but the few times I used it I had some adheasion problems. The only things we use from the deltron line anymore is 1791&1792 metal etch, and we still have some DP for hitches, trailers (stuff like that). Global has its own metal etch, but my rep showed us how the 1791&2 out performed it, and also out performed DP in scratched panels put through salt tests. It etches the metal to prevent rust even if scratched or chiped. As far as reduction goes the regular DP it was not made to be used as a sealer, but when shops learned of its great adhesion they started using it for a sealer. If used as a sealer it SHOULD be reduced with DT reducer (1:1:1/2) other wise your paint can die back (loose gloss) after drying.