I've used POR 15 on external under car places like frame and I like it. Can I use it with a wand to get inside rocker panels? I've seen cheapo wands for aerosol cans but I'm thinking more of using a cheap spray gun if I can get a wand that will work with it.
It is a flexible coating that will repel moisture and not crack.
POR15 is a very poor product and should never be used. Rust continues to grow even though you cannot see it. Pro shops never use it for good reason. It is marketed to unsuspecting hobbyists.
POR is crap. If you want to spray the inside of the rockers use the Eastwood Internal Frame Coating. It comes with a 24 inch plastic extension. I must say the product works well.
So it sounds like you don't recommend POR 15 for anything under the car? I am also replacing trunk pan and have a related question. The pan came with a black coating of some kind. Does it need primer before whatever I use as finish coat? Hopefully I don't have to sand off all that black coat. Then what do you recommend for it and frame rails or anything else under there?
The black coating should be EDP if it on offshore manufactured pan. Just scuff it and spray it with 2 or 3 coats of a quality epoxy primer. If you use SPI epoxy no topcoat is needed and it can be used on all underside parts without topcoating because it contains UV protection.
SPI can be ordered direct over the phone with free shipping.
I'm looking at SPI web site. Is Epoxy Primer 1:1 (#6620) what I need? Do I also need Epoxy Activator (#6700-4)? Do you think a quart will do entire under side of vehicle?
Yes that is the epoxy. It is mixed 1:1 with the activator so you will get two quarts of mixed epoxy. That might be enough but I would go with two plus two quarts or just go ahead and buy gallons. It is great for control arms, inner fenders etc. I brush it inside doors and spray trunks.
Also I'm doing some research on self etching vs epoxy primer. Confusing! So much of what I'm reading is based on using one or the other for a full paint job when right now I'm only concerned with under the car and the inside of the trunk. I may wind up replacing inner rockers and portions of floor pan as well as trunk. I won't be media blasting parts of the under carriage that are still solid. I may try to wire wheel those areas clean but I know that won't come close to media blasting. So I need to figure out what is the best approach given those assumptions.
I just remembered I have a gallon each of Nason full proxy and catalyst I bought 12 years ago. Neither have ever been opened. I may give it a try for just the under carriage stuff in the rear.
OK, I put 3 coats of Nason on it using a brush. I'm amazed with how smooth it is. All I did was the rear section of frame rails and tail panel. Tomorrow I plan to use a rattle can of some kind for a top coat. Is there any other prep I need before that? Any suggestions on what to use for top coat? Also I plan to spray spatter paint on the inside. Is that considered a top coat that will go directly on the epoxy primer?
Done. Now onto the inside of the trunk. Should I use my Nason epoxy primer there and then aerosol cans of spatter paint over that? Same rule apply about recoat window?
And for my next question: what is the best way to clean up the other parts of trunk area to get it ready for epoxy primer? I have run a wire wheel on an angle grinder everywhere it can reach but it can't get into corners and crevices of course. I was thinking naval jelly?
I blast everything. Issue with naval jelly is if you don't get it all off and neutralized your epoxy will fail. Hopefully someone else will offer some advice.
Naval jelly is an acid as far as I know. You have to neutralize the acidic film left behind by repeated rinsing with water. Do not allow the un-neutralized film to dry. Rinse immediately.
OK. I do rinse thoroughly. I've only used it once but at least for surface rust it was pretty good.
What was on there when I started is a coating of a tar like substance. Where I could get the wire wheel to it it ground off OK but it is on some places I can't get to with that. It's also on the inside of the quarters. I don't want to use a grinder or wire wheel on that. I'll see what naval jelly does to it but I doubt if it's going to do much to the tar.
I'm close to being ready to spray epoxy primer on the undersides of the trunk pans (still off the car) and I'm thinking of spraying the rest of the trunk area before welding the pans in. But now I can't find my spray guns. I have a DevilBlis StarterLine kit I bought years ago and never used. I am really looking forward to finally using it. Somehow it got moved and stored somewhere I haven't looked yet. If I don't find it soon I may use a cheapo siphon gun I bought at Home Depot. I used it for painting bookshelves with interior enamel. It comes with a 1.8 and a 2.2 tip. Is 1.8 what I would use for the expoy? Any other tips on using one of those versus a better automotive paint gun?
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Team Camaro Tech
2.4M posts
82.9K members
Since 1998
A forum community dedicated to 1st generation Chevy Camaros owners and enthusiasts. Come join the discussion about performance, builds, restoration, modifications, classifieds, troubleshooting, reviews, and more!