Join Date: Dec 2015
Location: Grand Rapids, MI
Undercoating w/ POR15?
This Summer I am planning on undercoating my T/A's underside. I plan on using POR15 and sanding down the little patches of rust that are in various spots too. My car is not very rusty underneath but I will probably have to drive during the winter in a year so I'm trying to gather information now on how to protect my car's underside. I've done a little bit of research but have found mixed opinions on the matter, the few questions I have regarding undercoating are as follows:
1. After using a degreaser/cleaner is it absolutely necessary to use the metal prep? or could I simply just apply the POR15, especially since I will be sanding down rust spots?
2. How much POR15 would I probably need to undercoat the floorpan and frame? I would also like to coat the axle and LCAs. Would a quart be enough to coat the underside?
1994 Trans Am A4, cc503, 1.6 RR mags, cc hyd roller lifters, cc beehives, pacesetter LT's, magnaflow cat-back, cat delete, stock heads, TB, dyno-tuned: 314 RWHP @ 5700 RPM, 312 RWTQ @ 4600 RPM "Slow T/A"