Brightening the exterior finish

I have the same problem as most with peeling decals after 10 years. I was looking into painting on the decals, but found Mobilty RV still had the almost full set. The retail price was $800, but they are on sale 1/2 off. I already had some purchased back in 2011. So I got what I needed for $250. Spent the last few days removing the Red Max Pro, peeping with Bar keepers friend and TSP. Found only straight ammonia worked after 3 tries with a rough sponge pad worked at removing the RMP. There floor stripper seemed to have a problem on the vertical walls. Ended up streaking and I kept it wet hru the whole process. I will reapply the RMP as it is the only thing that keeps the shine on an old MH.