Used a paint brush like suggested and it turned out awesome. Highly recommend.

This stuff works really well I would 100 percent keep buying this stuff for plastic wheel liners and plus it is solvent-based it really helps better than water-based no question asked. Makes my frame look like new buy the 1 gallon like I did.

Makes the frame and suspension look brand new, used on my 5 year old truck. Cleaned it up and then applied, a little goes a long way. Has lasted several months pretty pleased with longevity and ease of application.

Wow let me tell you something this product is amazing. It literally makes your undercarriage look so much better almost as if it was new. I let it dwell for 25-30 minutes after a wash as I apply a wax and tire dressing on my car. After the wipe down of my goodness I’ve never seen cleaner wheel arches and a dialed suspension come in so clean!! With the plastics being dressed I assume they will prevent cracking and fading and the fact that water doesn’t break it down makes me save time the next time around. Thank you shine supply for making this product work!!

Bought a small bottle of this stuff to try it out... well I should have bought the gallon. I've tried other undercarriage sprays and they are NOTHING like classy chassis. No streaks or spotting. Will definitely be purchasing more products from here.